Science Quiz

Stars twinkle because their light is distorted by the Earth's atmosphere, whereas planets appear as steady points of light because they are much closer to Earth.

Camouflage is an adaptation that allows an organism to blend into its environment. A white fox in the snow uses its color to hide from predators or prey.

Extinction is the dying out of a species. Natural disasters, disease, and hunting are all environmental or human factors that can lead to extinction, whereas love is an emotion.

Decomposers are organisms that break down dead organic matter. Bacteria, mushrooms, and many insects play this role in the ecosystem.

Plants are producers because they create their own energy using sunlight through photosynthesis. Consumers must eat other organisms to get energy.

A predator is an organism that hunts and kills other organisms for food. The organism being hunted is called the prey.

The sun is the primary source of energy for almost all life on Earth. It provides the light energy that plants convert into chemical energy.

An inclined plane is a flat surface tilted at an angle. Stairs act as a series of inclined planes to help move objects or people to a higher elevation with less force.

Gravity is the force that attracts objects toward the center of the Earth. It is responsible for keeping us on the ground.

In physics, a force is defined as any push or pull that can change the motion or shape of an object.

Sound is produced by the vibration of objects. These vibrations travel through a medium as waves.

In sound waves, frequency relates to the pitch (high or low), while amplitude relates to the volume (loud or soft).

The three primary states of matter are solid, liquid, and gas. Pudding is a mixture or a colloid, not a fundamental state of matter.

Sound travels fastest through solids because the molecules are packed more closely together, allowing vibrations to transfer more efficiently than in liquids or gases.

A prism is a transparent optical element that refracts light, causing it to disperse into its component spectral colors.

Transparent materials allow light to pass through them completely, which is why you can see clearly through objects like glass.

A revolution is the movement of one object around another. Earth's revolution around the sun takes approximately 365 days, or one year.

The day and night cycle is caused by the Earth rotating on its axis, which takes about 24 hours.

Revolution refers to the orbital motion of one body around another. Earth revolves around the sun.

An anemometer is an instrument used to measure the speed of the wind.

Evaporation is the process where liquid water turns into water vapor (gas) due to heat from the sun.

The water cycle describes the continuous movement of water on, above, and below the surface of the Earth.