8th Grade Science Test Review

Question 1

The Earth rotates on its axis once every

Accepted Answer

24 hours

Question 2

Which sequence represents the correct levels of organization for multicellular organisms?

Accepted Answer

cell -> tissue -> organ -> organ system

Question 3

Which geologic process occurs when the acid in precipitation dissolves certain types of rock?

Accepted Answer

chemical weathering

Question 4

Which process is represented by the four stages in this diagram?

Accepted Answer

metamorphosis

Question 5

Approximately how long does it take for the Moon to complete one orbit around the Earth?

Accepted Answer

One month

Question 6

A substance in the solid phase (state) of matter has

Accepted Answer

a definite shape and a definite volume

Question 7

If you had to take the science test today, what do you think you would get?

Accepted Answer

70-80, 90-100, 80-90, 60-70

Question 8

Most hormones are produced by which human organ system?

Accepted Answer

Endocrine

Question 9

A single human body cell typically contains thousands of

Accepted Answer

genes

Question 10

Which model can be used to trace genetic inheritance?

Accepted Answer

Pedigree

Question 11

A body cell that is undergoing abnormal cell division is most likely

Accepted Answer

forming cancerous cells

Question 12

Because copper is a metal, it is

Accepted Answer

a good conductor of heat

Question 13

Which planet is closest to the Sun?

Accepted Answer

Mercury

Question 14

In which part of a plant cell does photosynthesis occur?

Accepted Answer

Chloroplast

Question 15

A major function of a plant's roots is to

Accepted Answer

absorb water

Question 16

Which process in an apple tree primarily results from cell division?

Accepted Answer

Growth

Question 17

A major function of a plant's seed is to

Accepted Answer

store food to be used during early development

Question 18

Which type of energy is transferred from one object to another by simple machines?

Accepted Answer

mechanical

Question 19

Which greenhouse gas will increase the most if large forests are cut down?

Accepted Answer

carbon dioxide

Question 20

Most of the sunlight that strikes a snow-covered surface is

Accepted Answer

reflected

Question 21

Which process transfers heat when particles collide in a solid?

Accepted Answer

Conduction

Question 22

Carbon dioxide is an example of

Accepted Answer

a compound

Question 23

Which represents the correct order from smallest to largest?

Accepted Answer

solar system -> galaxy -> universe

Question 24

The gravitational force between two objects depends on the distance between them and their

Accepted Answer

masses

Question 25

What happens to a species when the environment changes and the organisms do not adapt?

Accepted Answer

Extinction

Question 26

Volcanic eruptions are caused primarily by the movement of

Accepted Answer

tectonic plates

Question 27

The layered mixture of gases surrounding Earth is called the

Accepted Answer

atmosphere

Question 28

What causes the seasons on Earth?

Accepted Answer

The tilt of Earth's axis

Question 29

Which human body system removes waste from the body?

Accepted Answer

Excretory system

Question 30

Basalt is a rock that forms when magma from volcanoes cools. What type of rock is basalt?

Accepted Answer

Igneous

Question 31

Which activity causes the greatest amount of greenhouse gas to enter the atmosphere?

Accepted Answer

Burning fossil fuels

Question 32

A biological community is made up of all the

Accepted Answer

populations living in an area

Question 33

One example of matter is

Accepted Answer

water

Question 34

Carnivores obtain most of their energy by

Accepted Answer

consuming animals

Question 35

Identify one omnivore in this food web

Accepted Answer

grouse (bird), bear

Question 36

Which process releases energy from digested food?

Accepted Answer

cellular respiration

Question 37

A cell's chromosomes contain

Accepted Answer

genes

Question 38

Which process is a cause of variation in a species?

Accepted Answer

Sexual reproduction

Question 39

Which weather condition commonly occurs along a cold front?

Accepted Answer

precipitation

Question 40

Which process results in a new cell with a complete set of chromosomes?

Accepted Answer

Fertilization

8th Grade Science Test Review

Questions 40

8th Grade Science Test Review

Questions 40