Now you can recognize heavy and light objects. Let's learn to compare two things to find out which is heavier and which is lighter! This is useful when we need to make choices, like which toy to carry or which box can hold more.

Comparing Weight

When we compare weight, we answer:
- Which is heavier?
- Which is lighter?
- Do they weigh the same?

How to Compare

Method 1: Hold One in Each Hand
- Put one object in your left hand
- Put the other in your right hand
- Which hand feels like it's working harder?
- That hand is holding the heavier object!

Method 2: Lift Them One at a Time
- Lift the first object and remember how it feels
- Lift the second object
- Which one was harder to lift? That's heavier!

Method 3: Use a Balance (if you have one)
- Put one object on each side
- The side that goes down holds the heavier object
- The side that goes up holds the lighter object

• Heavier: Weighs more, harder to lift
• Lighter: Weighs less, easier to lift
• Same weight: Both feel the same
• Heavier than: "The book is heavier than the pencil"
• Lighter than: "The feather is lighter than the rock"

1. Pick up the first object with one hand
2. Pick up the second object with your other hand
3. Notice which arm works harder
4. The one that makes your arm work harder is heavier
5. The other one is lighter

USGS Connection: Geologists compare rocks! Some rocks like pumice are light because they have air bubbles. Other rocks like granite are heavy.

NASA: Astronauts have to know which equipment is heavier. They can only take a certain weight to space!

Bureau of Labor Statistics: Workers need to know what's safe to lift. If something is too heavy, they use machines to help!

Compare these at home:
- A full milk jug vs. an empty milk jug
- Your shoe vs. your coat
- A full backpack vs. an empty backpack
- A big book vs. a little book