Life Science
Where do plants get the materials they need to grow?
air and water
What are particles too small to see that make up all matter called?
atoms and molecules
What is the main reason the sun appears brighter than other stars?
The sun is closer to Earth compared to other stars.
How does energy from the sun eventually become energy in food?
Plants use sunlight in photosynthesis to create food.
What happens to the energy in plants when animals eat them?
The energy is transferred to the animal for growth, repair, motion, and warmth
What happens to the total weight of matter when it is heated, cooled, or mixed?
it stays the same
What causes shadows to change length and direction during the day?
The position of the sun in the sky changes as Earth rotates.
Why do we measure and graph data during investigations?
To identify patterns and support conclusions.
What happens if decomposers like fungi or bacteria are removed from an ecosystem?
The cycle of matter would be disrupted, as dead material wouldn't break down
What property can you measure to identify a material, like how much light passes through it?
clear or transparent
What are the four systems of Earth that interact with each other?
Geosphere, biosphere, hydrosphere, and atmosphere.
Name one tool scientists use to model the Earth’s water distribution.
Graphs or charts showing percentages of saltwater and freshwater.
How does matter move between plants, animals, and the environment?
Matter cycles through processes like feeding, decomposition, and photosynthesis.
What is a sign that mixing two substances has created a new substance?
A chemical reaction such as a color change, temperature change, or gas production.
What is the percentage of Earth's water that is fresh water?
About 3%
What does a model show in science?
It represents a process, system, or concept to explain how it works.
Name a factor that could upset the balance of a local ecosystem.
Pollution, deforestation, climate change, invasive species, etc
Why does a dropped object always fall down toward Earth?
Earth's gravitational force pulls it down.
Name one way communities can protect Earth's resources.
Recycling, conserving water, reducing pollution, etc.
What is one way mixing substances can create something new?
Baking a cake mixes ingredients, and heat causes a chemical reaction to form the cake.