8th Grade Science Review

Matter and Forces

Energy and Waves

Ecosystems and Molecules to Organisms

Evolution and Hereditary

Earth Science

What type of reaction transforms sugar and oxygen into carbon dioxide and water?

A. Physical, only phases of matter change.

B. Physical, new substances are formed.

C. Chemical, only phases of matter change.

D. Chemical, new substances are formed.

Which of the following is the equation for gravitational potential energy?

A. ½ mass x velocity2

B. mass x acceleration

C. mass x gravity x height

D. mass x velocity

C. mass x gravity x height

Which is the longest stage of the cell cycle?

A. Interphase

B. Mitosis

C. Cytokinesis

D. Pollination

A. Interphase

Which term describes how humans have controlled the characteristics of horses today?

A. Acquired Characteristics

B. Spontaneous Generation

C. Natural Selection

D. Selective Breeding

When the moon is between the Earth and the Sun, and it casts a shadow on Earth, this is called a _____ .

A. Lunar Eclipse

B. Full Moon

C. Waxing Moon

D. Solar Eclipse

Chlorine is a poisonous green gas. Sodium is a soft silver metal which explodes in water. Together they form salt which is a white brittle solid used by animals. Which of the following is the best term for salt?

A. Mixture

B. Chemical Bond

C. Solution

D. Colloid

B. Chemical Bond

Which of the following materials would best be used as a thermal insulator?

A. Wood

B. Iron

C. Copper

D. Aluminum

A. Wood

What characteristics best protects cactus plants from predators and losing water?

A. Flat leaves and shallow roots

B. Spines and waxy coating

C. Flowers and acorns

D. Long branches and small flowers

B. Spines and waxy coating

Which process is used to create gametes?

A. Budding

B. Mitosis

C. Meiosis

D. Binary Fission

C. Meiosis

Which type of rocks form fossils?

A. Igneous

B. Sedimentary

C. Metamorphic

D. Synthetic

B. Sedimentary

What characteristics allow metal to be a good material for many parts in a car?

A. It is brittle, soft, and a good insulator.

B. It is strong, brittle, and biotic.

C. It is strong, malleable, and ductile.

D. It is flexible, a good insulator, and lightweight.

C. It is strong, malleable, and ductile.

Which of the following waves does not require a medium to travel through?

A. Transverse

B. Light

C. Water

D. Sound

B. Light

Which of the following is an example of a nutrient cycle?

A. Predation

B. Mutualism

C. Food Web

D. Carbon Cycle

Which term best describes how Venus flytraps obtained the characteristic of digesting insects?

A. Binary Fission

B. Natural Selection

C. Spontaneous Generation

D. Acquired Characteristics

B. Natural Selection

Which of the following would best preserve the ecosystem of a swamp?

A. Prevent drainage of water.

B. Replace trees with bushes.

C. Add in foreign species of organisms.

D. Dump in fertilizers

A. Prevent drainage of water.

As a person is climbing a rope very fast, the force applied on the rope is ____

A. Greater than the gravity’s pull.

B. Equal to the gravity’s pull.

C. Less than the gravity’s pull.

D. Less than the gravitational push.

A. Greater than gravity’s pull

What type of waves are x-rays?

A. Transverse

B. Mechanical

C. Sonar

D. Electromagnetic

Birds obtain carbon by _____.

A. Drinking water

B. Respiration

C. Eating insects

D. Nitrogen Fixation

C. Eating Insects

Which term describes comparing body structures of different animals to support the theory of evolution?

A. Comparative Anatomy

B. Spontaneous Generation

C. Biogeography

D. Genetic Drift

A. Comparative Anatomy

Which would best allow a nice sunny day in the park?

A. High Precipitation

B. Cold Front

C. High-Pressure System

D. Low-Pressure System

C. High Pressure System

Which of the following is the equation for force?

A. distance ÷ time

B. mass x acceleration

C. mass x gravity x height

D. mass x velocity

B. mass x acceleration

When a pendulum swings, there is a constant exchange between _____ energy and _____ energy.

A. Sound; Kinetic

B. Potential; Light

C. Kinetic; Potential

D. Electric; Potential

C. Kinetic; Potential

Mangrove trees stabilize the shoreline with their roots. What does this help prevent?

A. Tornadoes

B. Erosion

C. Algae Bloom

D. Earthquakes

B. Erosion

In relation to natural selection, which best describes the fitness of an organism?

A. Largest size of its population

B. Brightest color of its population

C. Ability to make loud sounds

D. Ability to survive to the age of reproduction and produce offspring

Which of the following would best be used with a microscope to view small samples of sand?