Science 7 Exam date change

The Unit 3 Topic 1 exam that was scheduled for today will be written instead on Friday, May 13th (OOOOHHHH!) due to the teacher strike last Thursday which took away one independent/group study period. Your review sheets will be due for credit at the exam, so please be sure to have them finished by Friday.

Review for Friday's quiz (e-copy of review given last week)

Science 7 Review – Unit 1 – Topics 5-7

1. Why is reducing waste better for our environment than recycling? Give 3 reasons.

2. How many biomes are there in the world? Name them.

3. True or false? Females are an example of a species. (If false, explain why.)

4. What is meant by the term “population”?

5. What does “community” mean, in the context of ecosystems?

6. List five examples of technology that humans have created to deal with their garbage/waste.

7. A forest fire burns a once-populated area to the ground and everything is destroyed. After some time, small plants start to regrow. What is this process an example of? (2 words)

8. What is a pioneer species?

9. Could a fox be an example of a pioneer species? Why or why not?

10. What is a climax community? Give an example of a climax community that you have seen in your own experience.

11. Which two biomes are present in Australia? What does this tell you about their climate?

12. Who has a bigger impact on their ecosystem: a human or a wolf? Explain your answer with three reasons from the textbook.

13. Picture a forest full of large trees. Identify one biotic and one abiotic factor that is capable of altering the forest ecosystem.

14. Explain why using pesticides can be harmful to humans.

15. Label each statement as a description of population, species, or community:

a. There are 40,000 people in Prince Albert. ____________________________

b. My dog had puppies. __________________________

c. At Waskesiu I saw several types of birds, insects, and even three pitcher plants on my walk around the Boundary Bog! _________________

d. My mom planted four rose bushes in her garden. ______________________

16. Identify and explain two factors (biotic or abiotic) that could alter the populations of an ecosystem.

Science 7 review questions - Topics 5-6 (Unit 2)

Science 7 Sample Review Questions (Unit 2: Topics 5 & 6)

1. We made juice in Science class and it tasted great. It was a solution that had just the right mixture of juice crystals and water. What kind of a solution did we create? Dilute, concentrated, saturated, or unsaturated? Circle one.

2. Orange juice from concentrate (in a can) is an example of a concentrated solution. What does this mean in terms of the amount of solute/solvent in the mixture?

3. What is the term given to the amount of solute (in grams) that can be dissolved in a certain amount of solution?

4. What is the unit of measurement of concentration?

5. Which of the following is more concentrated? A solution of 10g of drink crystals dissolved in 50 mL of water, or a solution of 25g of drink crystals dissolved in 100mL of water?

6. If a saturated solution has a concentration of 20g per 100mL of water, how many grams of the solute could be dissolved in 50mL of water?

7. Why are solutes generally able to dissolve faster in hot water than in cold water? Use the Particle Theory of Matter to support your answer.

8. When solute particles do not bind with solvent particles, the solutes are considered _________________.

9. What is hard water?

10. List two disadvantages to using hard water.

11. True or false: Glass is a pure substance.

12. Identify at least two raw materials used in making glass.

13. What is the difference between pig iron and steel?

14. True or false: Soap is a type of detergent.

15. What is a surfactant?

16. Name two components of toothpaste and explain their purpose.

17. What is meant by the term biodegradable?

18. What is sewage?

19. List one benefit and one drawback of using livestock manure as field fertilizer.

Sc 7 exam review

List three sources that add carbon dioxide to the air, water, and/or soil.

True or false? Energy cycles through ecosystems without ever being lost.

Describe the transfer of energy from one living thing to the next in an ecosystem.

What is a food web?

Explain the process of photosynthesis.

Brainstorm a list of as many natural changes that can cause changes in ecosystems.

Define species and give an example.

Define population and give an example.

Define community and give an example.

Living things are often in competition with each other for things like food, water, and living space. Give one example of competition between living things in ecosystems.

How might weather affect the population of an ecosystem?

What is meant by the term “pioneer species”? What kinds of species are most often pioneer species in an ecosystem?

What is the difference between primary and secondary succession?

Give on example of a pioneer species, and one example of a species in a climax community.

What is a biome? Give one example of a biome, describe it briefly, and explain where in the world it might be found.

True or false? Ecosystems can be changed by biotic and abiotic factors.

List the three main reasons why human beings have a bigger impact on ecosystems than any other living thing.

Give an example of a human technology that affects ecosystems and describe what effect it has.

Describe how humans spraying pesticides can ultimately affect their health in a negative way (diagram on p. 74)

Identify one example of human impact on an ecosystem that you could help to lessen and describe how you would go about lessening this impact.

Define biodegradable and give an example of a material that is biodegradable.

Name four methods of disposing of wastes using human technologies.

Why is reducing or reusing waste better than recycling?

Sc 7 Unit 1: Topics 1-4.1 Exam Study Guide Qs

Vocabulary to define, understand, and give examples where appropriate:

- habitat
- species
- producer
- consumer
- decomposer
- scavenger
- ecosystem
- biotic
- abiotic
- interaction
- chlorophyll
- photosynthesis
- by-product
- carnivore
- herbivore
- omnivore
- food chain
- water cycle
- evaporation
- condensation
- precipitation

Sample study questions:

1. What is meant by the term “seventh generation”? How can we help to ensure the survival of the seventh generation by our actions today?
2. List three beliefs held by the First Nations/Metis people of Saskatchewan regarding nature and the environment.
3. What happens, in scientific terms, to the body of an animal who dies in its natural habitat?
4. What are the six basic needs of all living things?
5. How can biotic and abiotic things interact with each other? Give at least 5 examples.
6. Explain how a puddle can be considered an ecosystem.
7. Draw 3 different food chains that have at least 4 steps in them (remember, they must always begin with a primary producer).
8. Describe how decomposers can be both beneficial and/or harmful to the environment/the human body.
9. What is photosynthesis? Draw a picture and describe in words how this process works.
10. How can human beings create and contribute water vapour to the atmosphere?
11. List 3 examples each of: carnivores, herbivores, omnivores.
12. Life on Earth would cease to exist without producers. Explain why, using as much detail as you can. Support your answer with examples.
13. What happens to the water that falls to the ground in the form of various types of precipitation (rain, snow, hail, etc.)? How is the water cycle completed?
14. List 5 biotic and 5 abiotic components of our classroom ecosystem.
15. What is the main purpose of photosynthesis? How do humans benefit from this process (at least 2 reasons)?

Sc 7 Unit 1 Exam - Topics 1-4.1

Hi girls! Your Science 7 exam dates are as follows:

Science 7C = Tuesday, Oct. 20th (P.1)

Science 7L = Wednesday, Oct. 21st (P.2)

I will be posting review questions shortly.

Sc 7 Final Exam review

Science 7 Final Exam review

Describe the cycle of nutrients.

Describe the food chain.  Why does the food chain always need to start with a producer.

 What is agar?

Who was Anton van Leeuwenhoek and what did his invention mean for the advancement of science and the understanding of the world around us?

Name the five types of microorganisms.

Are all microorganisms the same size?  Explain by giving a specific example.

What is a microbiologist?

What type of microorganism can be single celled or multi-cellular?

Which type microorganism is so small that it cannot be seen by a regular microscope?

Describe Alexander Fleming's discovery of penicillin.

Describe the ideal conditions for the rapid multiplication of microorganisms.  Give one example where this is beneficial (good) and one example of when it might be detrimental (bad).

Define producer, consumer, and decomposer.

What are toxins?

Name the three common types of food poisoning.

Describe how botulism/salmonellosis/staph is caused.

Which type of food poisoning is the most common?  How might it be prevented?

What is meant by the term fermentation?

Why does rubbing salt into cod fish help to preserve it?

Why does food kept in the cold take longer to spoil?

Describe how a plant can react to stimulus in its environment.

Are vital signs voluntary or involuntary movements?

What is locomotion?

Describe how snakes achieve locomotion.

What is the difference between a vertebrate and an invertebrate?

Describe how human beings achieve locomotion.

Some organisms do not have lungs.  Name one and describe how it takes in and expels gases (oxygen, carbon dioxide, etc.).

What is meant by the term extinct?  Give one example of a mammal that is extinct.

Name a structural adaptation that animals use for protection.

Name two different methods of reproduction in organisms.

What is meant by the term variation?  Give an example in humans.

What is regeneration?  Give an example.

Give an example of a manufactured structure and a natural structure that serve the same function.

What is design?

Name two structures used by early humans and describe their functions.

Name two structures (one manufactured, one natural) that serve the function of shelter.

What does the term properties mean?  Give an example.

Use the following words in a sentence: load, stress, compression.

What is an alloy?  Why is using alloys often a wise design decision?

What is a beam?

How might you alter a design to make a beam stronger?

What is a cantilever?

Where is the tension/compression when a load is placed on a cantilever?

What is a brace?

Give an example of triangles being used in design.

What is the benefit of using a geodesic dome?

Why is corrugated cardboard stronger than regular cardboard?

Describe the process of stress being distributed in an arch.

List 2 mobile joints and 2 rigid joints.

Science 7 review questions - Unit 2, Topics 5-7

These are the review questions from our game show activity.  Just as a reminder, your quizzes will be written as follows:

7P = Wednesday, May 6th (Period 2)

7C = Thursday, May 7th (Period 4)

Happy studying!

*******

What is the word that describes supporting pieces of wood or other materials around the base of a structure that form a triangle with the ground?

Describe why using triangles in design is often better than using squares.

Give two examples of braces in design (braces on teeth don't count).

What is meant by the term “corrugated”?

Why is corrugated cardboard stronger than regular cardboard? 

Define the term “column” and give an example of a column being used in design. 

There are many problems associated with using columns to build structures.  Name one.

What is the term given to the last stone placed in an arch?

Why didn’t early arches require mortar to be held together?

List 3 examples of rigid joints. 

List 3 examples of mobile joints.

Half an eggshell is what shape? 

Why are domes strong shapes to use in design?

What is the name given to a dome that is built up of a framework of triangles?

Science 7 exam review

The exam for both Science 7C and 7P will be on Wednesday, April 8th.  The exam is on Unit 2: Structures and Designs, Topics 1-4.

Pages in the textbook to re-read: p. 74-109

Study questions to complete: Checkpoint p. 110 #1-5

In addition to the Checkpoint questions, here are some terms and concepts to help you to study before the exam:

Key terms:

- structure

- design

- natural

- manufactured

- function

- technology

- materials

- properties

- stress

- load

- compression

- tension

- compressive strength

- tensile strength

- metal fatigue

- alloys

- beam

- cantilever

- orientation

- neutral axis

Additional study questions:

1.  List 10 examples each of manufactured and natural objects.

2.  Name three structures that serve the same function (list, and name the function).

3.  Describe how early human beings used simple structures to carry out basic functions.  How many can you brainstorm?  List them.

4.  Manufactured and natural objects often share similar designs.  What manufactured object has a design that may have been inspired by the spider web?  List as many other examples of manufactured and natural objects that share similar designs (i.e. kangaroo pouch/bunnyhug, mushroom/umbrella, bird/hang glider, etc.).

5.  Name two manufactured structures and two natural structures that are used for the function of digging.

6.  Describe why a train bridge made of plastic would not be a wise design decision.  Try to use the words materials, properties, stress, load, and compression/compressive strength in your answer.

7.  What must designers take into account when choosing the right materials to use for a structure?

8.  What will happen to a beam that is supported on both ends when it is put under stress?  Where is the tension?  Where is the compression?

9.  What will happen when a load is placed on a cantilever?  Where is the tension?  Where is the compression?

10.  Why are alloys often good material choices for structures?  What do they offer that single metals do not?

11.  How can a beam be strengthened so as to avoid bending or breaking under a load?  Draw a sketch of a strengthened beam.

12.  When a beam is placed on its narrow edge, what happens to the amount of load it can support?  Why?

13.  Explain why the amount of material along the neutral axis of a beam can be reduced without weakening the beam.  Why is reducing the material along the neutral axis beneficial to the structure?

Leave me a comment here if you have any questions or comments.  Happy studying! :o)

Science 7 Quiz Review

Hi gr. 7! Here are some review questions for you to complete as you study for the quiz. Just a reminder: 7C will write the quiz on Wednesday (19th) and 7P will write the quiz on Thursday (20th).

Science 7 Quiz Review

1. Provide full and complete definitions of the following terms, and give examples where appropriate:

a) organism
b) environment
c) structural adaptations
d) photosynthesis
e) digestion
f) lungs
g) extinct
h) locomotion
i) pulse
j) stomata
k) gills
l) spiracles

2. Describe the structural adaptations of the following insects and explain how the adaptations of their mouthparts allow them to obtain food:

a) Grasshopper
b) Housefly
c) Mosquito
d) Butterfly

3. Which of the following are parts of the human digestive system? Circle all that apply.

a) Mouth
b) Stomach
c) Small intestine
d) Anus
e) Pharynx
f) Kidney
g) Salivary glands
h) Pituitary gland
i) Large intestine
j) Rectum
k) Lungs
l) Liver

4. Describe the process of digestion in an earthworm.

5. Describe how the following organisms get gases in and out of their body:

a) Humans
b) Plants
c) Fish
d) Grasshoppers
e) Earthworms

6. True or False:

____ Grasshoppers use lungs to breathe
____ Blinking is an example of locomotion
____ Each body segment of an earthworm has three (3) layers of muscle
____ Vital signs are examples of movements that are easily controlled and observed
____ Plant movements are usually quick and easily visible to the naked eye

7. Compare and contrast the skeletons of a human and an insect. What are their similarities? How are they different?

8. Describe in detail how snakes achieve locomotion. Is the snake’s method of movement an efficient means of locomotion for humans? Why or why not?

9. List three (3) similarities between the movement of a fish and a human swimmer.

10. Which is the following is not an example of a vital sign?

a) Pulse rate
b) Cholesterol level
c) Breathing rate
d) Blood pressure

11. Give two (2) examples of plants showing movement.

12. Which living things do you think influenced the inventors of these devices?

a) Rubber flippers for skin-divers
b) Kite
c) Helicopter

13. List the structural adaptations of five (5) mammals that you remember from the student in-class presentations and describe how each adaptation helps the organism to survive in its environment.

14. What is unique about the way in which walking ferns show movement?

15. Do you feel more prepared for this quiz now after answering these questions?

a) Yes
b) No
c) Maybe
d) I don't know
e) Can you repeat the question?

:o)