Structure & Properties
What is matter?
Anything that has mass and takes up space.
What is a chemical change?
A change that results in the formation of new substances.
What is energy?
What is gravity?
A force that attracts two bodies toward each other.
What do plants need for photosynthesis?
Sunlight, carbon dioxide, and water.
How can you detect particles that are too small to see?
Using a model like a balloon or looking at the way they impact the environment
What is an example of a chemical reaction?
Burning wood or rusting iron.
How do animals use energy from food?
For activities such as movement, growth, and repairing body tissues.
What happens to an object when gravity acts on it?
It is pulled downward toward the Earth's center.
What do plants absorb from air?
Carbon dioxide.
What is the difference between a solid, liquid, and gas?
Solids have a fixed shape, liquids take the shape of their container, and gases fill the entire space available.
What is the importance of the conservation of mass in a reaction?
It ensures that no atoms are lost or created during the reaction, maintaining balance.
What role does energy play in body warmth?
Energy from food helps maintain a stable body temperature.
How does gravity affect falling objects?
It causes them to accelerate toward the ground.
Name a process that helps plants grow.
Photosynthesis.
Describe how gas particles behave in a balloon.
Gas particles move freely and spread out to fill the balloon.
Why do substances not change weight during a reaction?
Because atoms are rearranged, not lost or gained.
Why is food energy important for animals?
It is necessary for growth, movement, and maintaining body temperature.
What pulls objects toward the center of the Earth?
Gravity
What materials do plants use from their environment?
Carbon dioxide from the air and water from the soil.
What are the tiny particles that make up matter?
Atoms and molecules.
What happens to the weight of matter during a chemical reaction?
The weight remains the same; it is conserved.
How does energy from the sun help animals?
It provides energy for plants, which are food for animals.
Give an example of a gravitational force.
The force that keeps the moon in orbit around the Earth.
How do plants get what they need to grow?
From air, water, and nutrients in the soil.