Physical Science/ Matter
What are the three common states of matter?
Solid, liquid, and gas.
What do we call an organism that makes its own food, through photosynthesis?
Producer
What is the closest star to Earth?
Sun
What kind of change is it when water freezes into ice?
Physical change
Which of these is a physical change?
A) Burning paper
B) Melting ice
C) Rusting metal
B) Melting Ice
What is it called when a liquid turns into a gas, by heating?
Evaporation.
What is a consumer that eats only plants called?
Herbivore
What causes the phases of the Moon?
The Moon's position relative to Earth and the Sun.
What type of change happens when wood burns and turns into ash and smoke?
Chemical Change
What causes the seasons on Earth?
Earth’s tilt and revolution around the Sun.
Which state of matter has a definite volume but no definite shape?
Liquid
What is the process by which plants convert sunlight into food (Glucose)?
Photosynthesis
What is it called when the Earth moves around the Sun?
Revolution
True or False: A chemical change creates a new substance.
True
How long does one revolution around the sun take?
One year or 365 days.
What is is called when a gas turns back into a liquid, by cooling?
Condensation
In a food web, what is the term for organisms that break down dead material?
Decomposer
What is it called when the Earth spins on its axis?
Rotation
What clues can help you identify a chemical change? (Name at least two)
Change in color, production of gas (bubbles), formation of a precipitate, change in temperature, or a new odor.
What is the water cycle? List 3 parts of it.
Evaporation, condensation, precipitation, etc.
What is it called when a solid turns into a gas, by heating?
Sublimation
In an ecosystem, how does matter move between plants, animals, and the environment?
Matter moves in a cycle—plants use sunlight and take in water and nutrients, animals eat plants or other animals, and when living things die, decomposers break them down and return matter to the soil and air.
What causes day and night?
Rotation of the Earth.
Mixing vinegar and baking soda produces bubbles. What kind of change is this, and why?
Chemical change—because it produces a gas and a new substance.
What is thermal energy?
Energy related to heat
If an object sinks in water, what can you say about its density?
The object is more dense than water
What do arrows in a food chain show?
The flow of energy
What is the role of the Sun in the water cycle?
What is it provides the energy for evaporation?
You observe a cloud, what part of the water cycle is this?
Condensation
What do we call the imaginary line that Earth spins on?
Axis