حل ورقة عمل Changes Affect Organisms العلوم المتكاملة الصف الثالث

حل ورقة عمل Changes Affect Organisms العلوم المتكاملة الصف الثالث

Choose and Circle the correct answer

1. A. type of organism that has no living population is said to
be_________
A. Fossils
B. Remains
✓ C. Extinct

2. Use the table below to answer question 

Which animal was most likely to be a meat eater?
A. Wooly mammoth
✓ B. Saber toothed cat
C. Pterodactyl

3. The fossil of a fish was found at the top of a mountain. Which
statement is true?
A. The mountain was once a hill
B. Fish used to live on the mountain.
✓ C. The mountain was once under water.

4. Sometimes an animal leaves a footprint on the ground, this is
called————-
✓ A. Trace fossils
B. Cast
C. Mold

True or False

5. Extinction is when there is no more of an organism left on Earth?
✓ A. True
B. False

SECTION B

1. What is an ecosystem?
A. An area that includes only living thing
B. Group of species
✓ C. An area that includes living and non- living things

2. Which animal are you most likely to see in a desert?

came
3. All life requires air, food and water. Which ecosystem will have the least amount of plant and animal life?
A. Ocean
B. Forest
✓ C. Desert

4. What do we call the place where an animal lives?
A. Population
B. Home
✓ C. Habitat

5. Which is one-way humans can effect an ecosystem in a negative way?
A. Planting trees
✓ C. Cutting down trees
D. Planting a garden

6. Look at the picture and answer the questions.

6.1. How did the break in the dam wall affect the ecosystem?
The dam was opened, and water came onto the land. It
flooded the plants. The water covered the habitats of the
animals, causing them to move.

6.2. How can a beaver dam change the ecosystem?
A. It can prevent floods
B. It can prevent droughts
✓ C. It can block the flow of water and cause floods

7. True and False

Park Rangers work in state or national parks?
✓ A. True
B. False

8. Fires, floods and droughts can cause dramatic changes in ecosystems?
✓ A. True
B. False