Earth in Space and Time
What is the name of the star at the center of our solar system?
The Sun.
What do we call a baby frog before it becomes an adult frog? (use a simple life stage term)
Tadpole (for a frog) — the baby stage before the adult frog.
What do we call relationships between plants and animals where they help each other or need each other to survive?
These relationships are called interactions or interdependence (accept “symbiosis” for close-helpful relationships).
What is it called when scientists make a careful test to try an idea and collect data?
An experiment or investigation.
What are the three common states of matter you learn about in elementary school?
Solid, liquid, and gas
Why does the Sun look larger and brighter than other stars in the night sky?
Because the Sun is the closest star to Earth.
Name two basic needs that all living things share.
Two basic needs: food and water (also acceptable: air and shelter).
Give one example of how a plant depends on animals.
Example: Animals help plants by spreading their seeds or by pollinating flowers (e.g., bees spread pollen to help plants make seeds).
Why is it important to do the same test more than once (repeat an investigation)?
Repeating a test helps make sure results are reliable and not a mistake.
Is melting ice a physical change or a chemical change?
Melting ice is a physical change because the ice changes from solid to liquid but the substance (water) is the same.
What two things help scientists see many more stars than we can with our eyes alone?
Telescopes and cameras (or telescopes and other instruments that gather more light).
What is one way animals change as they grow from young to adult? Give an example
Example: A caterpillar grows and becomes a butterfly (change in body form); a tadpole grows legs and becomes a frog.
Name two things animals might compete for in their environment.
Animals might compete for food and shelter (also acceptable: water, mates, space).
Give one example of an observation (not an opinion) a student could record during a simple experiment.
Observation example: “The liquid turned blue” or “The ball rolled 2 meters” (not opinions like “that was boring”).
Give two properties you can use to describe an object.
Two properties: color and texture (other acceptable answers: size, shape, hardness).
Describe one way you can demonstrate that gravity is a force that can be overcome (a simple classroom example).
Example answer: Drop a small ball so it falls to the floor, then toss it gently upward; gravity pulls it back down (this shows gravity acts on objects and can be overcome by a push).
Explain the difference between a physical change and a life cycle change in a living thing.
Physical change vs life cycle change: A physical change alters how something looks but not what it is (like a leaf tearing), while a life cycle change is a natural series of stages an organism goes through to become an adult (like egg → caterpillar → chrysalis → butterfly).
Describe one way removing a type of plant from an area might affect the animals that live there.
Removing a plant could reduce food or shelter for animals, causing some animals to leave or their populations to decrease (example: removing berry bushes removes food for birds).
Explain why scientists share their results with others (one or two simple reasons).
Scientists share results so others can learn from them, check the work, and build new ideas.
Describe a simple classroom activity to show that rubbing two objects together can produce heat.
Activity example: Rub your hands together quickly and feel them get warmer — this shows rubbing creates heat (or rub two wooden blocks together safely).
Explain why the Sun is important for life on Earth (name two reasons).
The Sun provides light for seeing and warmth/heat; it also provides energy for plants to grow (photosynthesis).
Describe how knowing an organism’s life stages helps people take care of it
Knowing life stages helps people give the right care at each stage — e.g., knowing a baby bird (hatchling) needs frequent feeding and warmth, while an adult bird does not; or knowing to provide water for tadpoles but different habitat for adult frogs.
Explain how a change in water availability (less water) could affect both plants and animals in a habitat.
Less water can make plants wilt or die, which reduces food and shelter for animals; animals may move away, compete more, or have fewer offspring.
Describe a fair test: name one thing you should change and one thing you should keep the same in an experiment (use a clear example).
A fair test example: If testing which soil helps plants grow best, change only the soil type (the thing you test) and keep sunlight, water, and plant type the same (the controlled factors).
Explain how you could test whether a substance dissolves in water.
Test for dissolving: Put a measured spoonful of the substance in a clear cup of water, stir for a set time, watch to see if it disappears (dissolves) or settles; compare with a control cup of water with nothing added.