Science Exploration for Grade 8

Front

What is the basic unit of life?

Back

Cell

Front

What organelle is known as the powerhouse of the cell?

Back

Mitochondria

Front

What is the chemical equation for photosynthesis?

Back

6CO2 + 6H2O -> C6H12O6 + 6O2

Front

What is the process called when a substance changes from a solid to a liquid?

Back

Melting

Front

What are the three main layers of the Earth?

Back

Crust, Mantle, Core

Front

What is the outermost layer of the Earth called?

Back

Crust

Front

What system in the human body is responsible for transporting blood?

Back

Circulatory system

Front

What is the function of the respiratory system?

Back

The function of the respiratory system is to facilitate gas exchange, providing oxygen to the body and removing carbon dioxide.

Front

What is Newton's first law of motion?

Back

An object will remain at rest or in uniform motion unless acted upon by an external force.

Front

What is the difference between speed and velocity?

Back

Speed is scalar; velocity is vector (includes direction).