Final Science

Question 1

How old is Earth according to scientists?

Answer 1

Earth is 4.6 billion years old according to scientists

Question 2

What do fossils provide evidence of?

Answer 2

They provide evidence of how life and the environmental conditions have changed over time.

Question 3

What is the age of Earth based on?

Answer 3

Fossil records

Question 4

What is a fossil?

Answer 4

A fossil is preserved remains or traces of an organism.

Question 5

What did scientists create to help them understand the age of the earth?

Answer 5

Geological time scales

Question 6

What conditions are needed for a fossil to form?

Answer 6

The type of organism and the environmental conditions in which it dies.

Question 7

What happens to organisms when landmasses split or when the climate changes?

Answer 7

They evolved

Question 8

What are the geologic time scale categories (4)

Answer 8

eon, era, epoch in order.

Question 9

Which type of rock are you most likely to find a fossil?

Answer 9

Sedimentary Rock

Question 10

What is adaptation?

Answer 10

The organism’ ability to change to respond the environment

Question 11

How do organisms inherit their traits?

Answer 11

Their parents

Question 12

What traits can you inherit?

Answer 12

Eye color, face shape, and hair color

Question 13

What are all organisms constantly working towards?

Answer 13

They are striving to survive

Question 14

Which animal species is most likely to survive as humans change their environment?

Answer 14

Those that will best be able to adapt to the changes are more likely to survive.

Question 15

What is camouflage?

Answer 15

Color or pattern on an animals’ body to help blend in from predators

Question 16

What is genetic variation?

Answer 16

Presence of natural differences within a species

Question 17

What is natural selection?

Answer 17

The theory stating that natural variation among organisms that make them best adapted to their environment live and reproduce, therefore passing on to their offspring the genetic qualities best suited to that environment

Question 18

What type of population growth do developed countries have

Answer 18

Not a lot of population growth

Question 19

What type of population growth do developing countries have?

Answer 19

There is a lot of population growth

Question 20

What are some problems human population growth causes?

Answer 20

More burning of fossil fuels, more traffic, more pollution

Question 21

What is the world’s population now? What is the world population estimated to be in 2050?

Answer 21

8 billion and the it is estimated to be 9 billion

Question 22

How often does Earth’s population double in size?

Answer 22

The Earth’s population doubles every 50 years.

Question 23

How does growing populations affect transportation?

Answer 23

Growing populations affect it because It can be hard to move millions of people around big cities.

Question 24

What tends to happen to the populations in developing countries over time, as the countries become more developed?

Answer 24

Growth eventually slows down.

Question 25

What is a push factor?

Answer 25

Push factor are things that push you away from an area.

Question 26

Give 2 examples of a push factor.

Answer 26

Three push factors that affect population growth are crime, no job opportunities, and not living in proximity to people you know (such as friends, family ect.)

Question 27

What are the pull factors?

Answer 27

Pull factors are factors that pull you to an area.

Question 28

Give 2 examples of pull factors.

Answer 28

Three pull factors that affect population growth are job opportunities, good area (less crime), and proximity to family and friends.

Question 29

How do chemicals benefit society?

Answer 29

Chemicals prevent crops from being ,medicines, cleaning supplies, food preservatives, agriculture

Question 30

How do chemicals hurt society?

Answer 30

Chemicals can cause health problems, contribute to water pollution, kills animals, pollute air and ground

Question 31

What government agencies test and approve the use of chemicals?

Answer 31

FDA and EPA

Question 32

What is the goal of these agencies?

Answer 32

The goal is preventing harmful side effects.

Question 33

Why are people living longer?

Answer 33

Modern Medecine

Question 34

What are natural chemicals?

Answer 34

Natural chemicals are chemicals that occur naturally such as oil.

Question 35

What are synthetic chemicals?

Answer 35

Chemicals that are made by humans.

Question 36

How is organic farming different from traditional farming?

Answer 36

Organic farming is different from traditional farming because Organic farming does not use chemical pesticides..

Question 37

What are the 4 types of chemical hazards?

Answer 37

flammability , corrosive, reactivity, and toxic

Question 38

What must people do when deciding whether or not to use a chemical?

Answer 38

You need to weigh the benefits and risks of the chemical..

Question 39

What are pesticides?

Answer 39

Chemicals that control the amount of pests on crops

Question 40

What are homogeneous mixtures?

Answer 40

homogeneous mixture is an evenly distributed and uniform, cannot be physically separated from each other.

Question 41

Give an example.

Answer 41

; Soda; Salt water

Question 42

What are heterogeneous mixtures?`

Answer 42

Heterogeneous mixture is not evenly distributed and not uniform mixture can be physically separated.

Question 43

Give an example.

Answer 43

Salad dressing and salad