8th Grade Science Test Review #1

Question 1

Most hormones are produced by which human organ system?

Accepted Answer

Endocrine

Question 2

What causes the seasons on Earth?

Accepted Answer

The tilt of Earth's axis

Question 3

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

Accepted Answer

mechanical

Question 4

Which model can be used to trace genetic inheritance?

Accepted Answer

Pedigree

Question 5

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

Accepted Answer

reflected

Question 6

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

Accepted Answer

forming cancerous cells

Question 7

Because copper is a metal, it is

Accepted Answer

a good conductor of heat

Question 8

Volcanic eruptions are caused primarily by the movement of

Accepted Answer

tectonic plates

Question 9

Which form of energy are x-rays and ultraviolet light?

Accepted Answer

electromagnetic

Question 10

The layered mixture of gases surrounding Earth is called the

Accepted Answer

atmosphere

Question 11

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

Accepted Answer

Growth

Question 12

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

Accepted Answer

Igneous

Question 13

A major function of a plant's seed is to

Accepted Answer

store food to be used during early development

Question 14

Which feature best distinguishes one form of electromagnetic energy from another?

Accepted Answer

wavelength

Question 15

A biological community is made up of all the

Accepted Answer

populations living in an area

Question 16

In which part of a plant cell does photosynthesis occur?

Accepted Answer

Chloroplast

Question 17

Which represents the correct order from smallest to largest?

Accepted Answer

solar system -> galaxy -> universe

Question 18

Which process transfers heat when particles collide in a solid?

Accepted Answer

Conduction

Question 19

If the magnets are brought closer together, they will

Accepted Answer

repel each other with a stronger force

Question 20

A major function of a plant's roots is to

Accepted Answer

absorb water

Question 21

Which object would have the greatest force?

Accepted Answer

a 5-kg object accelerating at 20m/s2

Question 22

If the force used to push a shopping cart increases, the cart’s acceleration will

Accepted Answer

increase

Question 23

Which process releases energy from digested food?

Accepted Answer

cellular respiration

Question 24

Which planet is closest to the Sun?

Accepted Answer

Mercury

Question 25

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

Accepted Answer

Extinction

Question 26

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

Accepted Answer

masses

Question 27

In a car accident ,a seat belt helps prevent injuries by applying a force

Accepted Answer

in the opposite direction of the passenger’s motion

Question 28

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

Accepted Answer

Fertilization

Question 29

Which process is a cause of variation in a species?

Accepted Answer

Sexual reproduction

Question 30

Which human body system removes waste from the body?

Accepted Answer

Excretory system

Question 31

A cell's chromosomes contain

Accepted Answer

genes

Question 32

Which position would have the strongest attraction to the north pole of another bar magnet?

Accepted Answer

D

Question 33

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

Accepted Answer

One month

Question 34

Which diagram best represents light being reflected off the flat surface of a mirror?

Accepted Answer

1

Question 35

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

Accepted Answer

Burning fossil fuels

Question 36

The Earth rotates on its axis once every

Accepted Answer

24 hours

Question 37

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

Accepted Answer

metamorphosis

Question 38

One example of matter is

Accepted Answer

water

Question 39

Carbon dioxide is an example of

Accepted Answer

a compound

Question 40

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

Accepted Answer

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

Question 41

Which weather condition commonly occurs along a cold front?

Accepted Answer

precipitation

Question 42

Which process causes the metal spoon to appear split or broken?

Accepted Answer

refraction

Question 43

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

Accepted Answer

carbon dioxide

Question 44

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

Accepted Answer

cell -> tissue -> organ -> organ system

Question 45

A single human body cell typically contains thousands of

Accepted Answer

genes

Question 46

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

Accepted Answer

a definite shape and a definite volume

Question 47

Carnivores obtain most of their energy by

Accepted Answer

consuming animals

Question 48

Identify one omnivore in this food web

Accepted Answer

grouse (bird), bear

Question 49

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

Accepted Answer

chemical weathering

Question 50

Sound will not travel in a ____________?

Accepted Answer

vacuum

8th Grade Science Test Review #1

Questions 50

8th Grade Science Test Review #1

Questions 50