Chapter 3

Question 1

What happens when harmful materials get into the air, water, or land.

Answer 1

Pollution

Question 2

The hardened remains a living thing.

Answer 2

Fossil

Question 3

All the living and nonliving things that interact in an environment .

Answer 3

Ecosystem

Question 4

The place where a living thing makes its home

Answer 4

Habitat

Question 5

All the different populations in an ecosystem.

Answer 5

Community

Question 6

The struggle among living things.

Answer 6

Competition

Question 7

All the members of a single type of living thing in an ecosystem

Answer 7

Population

Question 8

All dead, no more left alive on Earth

Answer 8

Extinct

Question 9

To turn an old thing into something new.

Answer 9

Recycle

Question 10

Efforts to save our natural resources

Answer 10

Conserve

Question 11

Name 3 different types of fossil:

Answer 11

Answers will vary: Pterodactyls, fish, recycle

Question 12

How can people help to improv our environment?

Answer 12

Reduce, reuse, recycle.

Question 13

Some dinosaur fossils have structures that look like wings. What can we infer about these animals?

Answer 13

They were probably birds that could fly

Question 14

What 3 resources do all living things compete for?

Answer 14

Water, food, and… space, sunlight,shelter, shade…

Question 15

An ecosystem, a community, and a population are all part of a what?

Answer 15

an environment

Question 16

how do beavers change the environment?

Answer 16

They destroy trees growing in the area and stop the water flow.
The area will become flooded,, and then turn into a pond or wetlands which will support new life forms. Life downstream will be very different. Plants and animals that rely on the flowing water will adapt, relocat, or die.

Question 17

How do people permanently change our environment?

Answer 17

By building houses and buildings, using fossil fuel s that pollute , by cutting down forests, by people bringing new plants and animals into an ecosystem.

Question 18

Are all changes bad for our environment? Give an example of a good change.

Answer 18

Good changes include using eco friendly power sources such as solar power and electric cars. Plant trees is also a change for the good.

Question 19

Why do scientist study fossils?

Answer 19

To learn about them about them and to compare them to animals today to see how they’‘ve changed. Studying fossils give clues about the living things size or shape. Sharp or flat teeth give clues about what the animals ate. Fossils can also teach us how animals moved. Fossils can tell us how our land has changed over the years… example: if we find fish, we know water covered that part of the earth.

Question 20

what happens if a habitat/biome has loses most of its plant life?

Answer 20

Animals living in that area will adapt, relocate or die

Question 21

Do changes in the population affect living things in other populations

Answer 21

Yes. For example, if a prairie dogs became extinct, the coyotes that hunt would adapt, relocate, or die.

Question 22

Describe a prairie dog ecosystem.

Answer 22

It would include all the living and nonliving things in the area: Eagles, coyotes,prairie dogs,burrowing owls mice, ferrets, prairie dog tunnels and borrows, grasses.

Question 23

Is it true that some fossils look similar to plants and animals that are alive today?

Answer 23

Yes. Some animals have stayed about the same for millions of years: crocodiles, shrimp, and cockroaches are a few examples.

Question 24

What things might occur that would lead to an animal’s extinction?

Answer 24

a change in the climate, over hunting or overfishing, exposure to pollution or dangerous chemicals (D DT), a loss of habitat (clear cutting in the rainforest)

Question 25

What would happen to coyotes if prairie dogs were removed from the grassland?

Answer 25

The coyotes would need to find another food source so they would need relocate. Prairie dog tunnels and burrows would collapse.

Question 26

What are the similarities and differences between elephants and mammoths?

Answer 26

Mammoths had elephants have similar physical charecteristics. Both lived in groups, had flat teeth. The mammoth had wooly fur to keep it warm, and small ears to conserve heat. It had longer tusks, bigger, heavier bones, and shorter legs.