Vocabulary
Science
Math
Human Biology
Brain Teasers
100

If something is difficult to understand, it is this.

What is confusing?

100

This is the closest planet to the Sun.

What is Mercury?

100

What is 9 × 8?

What is 72?

100

This organ pumps blood through your body.

What is the heart?

100

What has hands but cannot clap?

What is a clock?

200

If someone is honest and always tells the truth, they are this.

What is trustworthy?

200

Plants use sunlight, water, and carbon dioxide to make food in this process.

What is photosynthesis?

200

What is 144 ÷ 12?

What is 12?

200

These organs help you breathe and take in oxygen.

What are the lungs?

200

What has to be broken before you can use it?

What is an egg?

300

This word means to look at something very carefully.

What is examine?

300

This force keeps the planets moving around the Sun.

What is gravity?

300

A class has 24 students. They split into groups of 6. How many groups are there?

What is 4 groups?

300

This part of your body sends messages that control thinking, movement, and feelings.

What is the brain?

300

The more you take away from me, the bigger I get. What am I?

What is a hole?

400

This word means very big or huge.

What is enormous?

400

The center of the Earth is called the Earth’s _____.

What is the core?

400

What is 3/4 + 1/4?

What is 1?

400

This system in the body helps break down food and turn it into energy.

What is the digestive system?

400

What comes once in a minute, twice in a moment, and never in a thousand years?

What is the letter M?

500

This word means to make something better or improve it.

What is enhance?

500

Animals that eat only plants are called this.

What are herbivores?

500

What is the perimeter of a rectangle with sides 5 cm and 8 cm?

What is 26 cm?

500

These vessels carry blood away from the heart.

What are arteries?

500

I speak without a mouth and hear without ears. I have no body, but I come alive with wind. What am I?

What is an echo?