lesson
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Look at two rocks on the ground. How can you find out for sure which one is rougher and which one is heavier?
Scientists do not just make a random guess. Instead, they plan an investigation to find real answers.
An investigation is a step-by-step plan to look closely, measure, and describe objects in the world.
📊Interactive diagram
What special helpers do we need before we start looking closely? Let's check our scientist tool kit.
Choosing Your Tools
Different science questions need different tools to help our five senses.
We use a hand lens to see tiny details up close, and a ruler to measure how long something is.
📊Interactive diagram
Now that our tools are ready, what does a real investigation look like in action? Let's test three leaves from the playground.
A Leaf Investigation
Our question is: How are these three leaves different from each other?
We look closely with our eyes, feel the surface with our fingers, and measure each leaf with a ruler.