SCIENCE

Life Science

Earth Science

Physical Science

Random

100

There are many criteria that are used to define living things. Living things reproduce, grow, and develop. They respond to stimuli, use materials and energy, and evolve and adapt over time to their environment. What is another criteria used to define living things?

A. All living things are intelligent.

B. All living things are able to move.

C. All living things are complex.

D. All living things are made of cells.

D. All living things are made of cells

100

Index fossils are found throughout the world and come from organisms which existed during limited periods of geologic time. Which of the following best describes what index fossils can be used to determine?

A. when an organism first appeared on Earth

B. how an organism evolved over time

C. the way an organism went extinct

D. the age of a layer of rock

100

The particles of an object were spread out. Heat was taken away from the object, and it changed state. Now, the particles of the object are closer together. What change of state happened to this object?

A. It changed from a liquid to a gas.

B. It changed from a gas to a liquid.

C. It changed from a solid to a gas.

D. It changed from a solid to a liquid.

B. It changed from a gas to a liquid.

100

What body systems interact and work to expel wastes from the body?

A. nervous and circulatory

B. digestive and excretory

C. digestive and circulatory

D. nervous and excretory

B. digestive and excretory

100

The Earth's crust is made of tectonic plates. These plates are constantly in motion. How are earthquakes related to the movement of tectonic plates?

A. Two plates collide and the edges of the plate begin to crumble.

B. Gravity pulls down large amounts of soil on Earth's surface causing the plates to shake.

C. Magma pushes a tectonic plate upward from under the surface of the Earth.

D. Tectonic plates move against each other and release energy into the surface of the Earth.

200

Dylan is using a microscope to look at the cells in onion skin. Why does he need a microscope to look at the cells?

A. The microscope separates the individual cells.

B. Cells are too small to see with the naked eye.

C. The microscope collects the cells together.

D. Cells are too far away to see with the naked eye.

B. Cells are too small to see with the naked eye.

200

Which layer of the Earth is made up of tectonic plates?

A. mantle

B. inner core

C. crust

D. outer core

C. crust

200

Adele goes camping with her dad. At night, they make a campfire and sit near it for warmth. Which type of heat transfer is described?

A. friction

B. convection

C. radiation

D. conduction

C. radiation

200

The cell membrane

A. is the site of most cellular chemical reactions.

B. converts glucose to other energy molecules.

C. alters and packages proteins and lipids.

D. controls which substances enter and exit the cell.

200

Tropospheric ozone is produced when air pollutants from automobiles and factories chemically react with sunlight. The ozone that is produced in the Earth's troposphere traps heat close to the surface of the Earth.

Global industrialization is causing an increase in tropospheric ozone that will most likely lead to

A. an increase in volcanic activity on Earth.

B. an increase in global surface temperatures.

C. a decrease in global surface temperatures.

D. a decrease in volcanic activity on Earth.

B. an increase in global surface temperatures.

300

Which of the following organelles is found in most plant cells, but is never found in animal cells?

A. chloroplasts

B. nuclei

C. cell membrane

D. mitochondria

A. chloroplasts

300

Which of the following is true about processes that shape the Earth?

A. Although there are many different processes that shape the Earth, none of the processes can be observed by humans.

B. All processes that shape the Earth begin and end within a person's lifetime.

C. Only one process shapes the Earth in a way that humans can notice.

D. Some processes that shape the Earth are happening so slowly they cannot be easily detected in a human's lifetime.

300

People often place ice into a warm liquid to make their drink colder. Which statement best explains how ice makes a liquid colder?

A. The ice pushes cool air into the liquid’s solid container.

B. The ice changes the chemical properties of the warm liquid.

C. Coldness flows from the colder ice into the warm liquid.

D. Heat flows from the warm liquid into the colder ice.

300

Heat can be transferred through the processes of conduction, convection, and radiation. Which of these descriptions is an example of convection?

A. The temperature of a frying pan increases when it touches a hot stove.

B. Light waves from the Sun cause a sidewalk to get hotter during the day.

C. A person's hand gets colder as it stays in contact with an ice cube.

D. Moving air in an oven transfers heat as hot air rises and cold air sinks.

300

The temperature of an object is directly related to

A. the potential energy of its chemical bonds.

B. the volume of the object.

C. the motion of its particles.

D. the mass of the object.

C. the motion of its particles.

400

Which organelle is the control center of the cell?

A. chloroplasts

B. nucleus

C. cell membrane

D. mitochondria

B. nucleus

400

The eastern coast of South America and the western coast of Africa are separated by the Atlantic Ocean. If scientists find the same types of plant fossils on the eastern coast of South America and the western coast of Africa, which of these would be the best conclusion?

A. At one time, the two continents were one landmass.

B. The oceans were formed after dinosaurs went extinct.

C. Dinosaurs once lived in both of these regions.

D. The climate in each continent has changed.

A. At one time, the two continents were one landmass.

400

What is a wave frequency?

A. the speed that a wave is passed from particle to particle through a medium

B. the loudness of a wave as it travels though the air

C. the height of a wave between peak and trough

D. the number of waves that pass a fixed point in a fixed period of time

400

What causes a plant to appear green?

A. The plant absorbs green light and reflects other light waves.

B. The plant creates light that has the correct amplitude for the color green.

C. The plant creates light that has the correct wavelength for the color green.

D. The plant reflects green light and absorbs other light waves.

400

What is the source of most of the rain that falls on the continents?

A. water that evaporates from the oceans and condenses into clouds

B. water vapor that is released by lakes and collects in the atmosphere

C. water vapor that is released by plants and collects in the atmosphere

D. water that evaporates from the ground and condenses into clouds

A. water that evaporates from the oceans and condenses into clouds

500

Which of the following is arranged in the proper order from smallest to biggest?

A. organ systems

organs

tissues

cells

B. cells

tissues

organs

organ systems

C. cells

organs

tissues

organ systems

D. tissues

cells

organ systems

organs

B. cells tissues organs organ systems

500

How do metamorphic rocks form?

A. Sediment and small rocks are pressed and slowly cemented together.

B. Bones and shells of dead animals are buried by sediment in a short amount of time.

C. Molten rock touches air above the ground and then quickly cools to become solid.

D. Heat and pressure are added to igneous and sedimentary rocks over a long period of time.

500

Which statement correctly expresses a difference between light waves and sound waves?

A. Light waves have measurable wavelengths, but sound waves do not.

B. Light waves have a constant speed, but sound waves have different speeds in different materials.

C. Sound waves transmit matter, but light waves transmit energy.

D. Sound waves travel through matter, but light waves can travel through areas with no matter.

500

Convection currents, which affect weather and climate, are created by

A. erosion of ocean beaches.

B. slow, constant tectonic movement.

C. mining of the seafloor.

D. the uneven heating of the Earth.

500

Water is cooler near the poles and warmer near the equator. Movement of cooler and warmer water from these regions moderates the global climate. Which of the following describes the movement of water between the poles and the equator?

A. ocean currents

B. evaporation

C. gravity

D. tides

A. ocean currents