Biology
What is the process by which plants make their food using sunlight?
Photosynthesis.
What is a black hole?
A black hole is a region of space where the gravitational pull is so strong that not even light can escape from it.
What is an atom?
An atom is the smallest part of an element. It is made up of three parts: protons, neutrons, and electrons.
How much bones are there in a human body?
206
What is the speed of light?
186,282 miles per second.
What happens during a chemical reaction?
In a chemical reaction, substances mix and form new substances. For example, when baking soda mixes with vinegar, they react and create carbon dioxide gas.
What part of the plant absorbs water and nutrients from the soil?
The roots.
What is force?
A force is a push or pull on an object that can make it move, stop, or change direction.
What is a molecule?
A molecule is made up of two or more atoms that are chemically bonded together, like the two hydrogen atoms and one oxygen atom in a water molecule (H₂O).
What is the green pigment in plants that is used in photosynthesis?
Chlorophyll.
What is gravity?
Gravity is a force that pulls objects toward the Earth. It’s what makes things fall to the ground.
What are the three main states of matter?
The three main states of matter are solids, liquids, and gases.
What is the largest organ in the human body?
The skin?
What is friction?
Friction is a force that slows down or stops the movement of objects when they rub against each other.
What is a solution?
A solution is a mixture where one substance dissolves in another. For example, when salt dissolves in water, it forms a solution.