🔒 Keep it the same

The answers, and why

1. In the "Does a bigger parachute fall slower?" test, which one must stay the same? The same weight hanging underneath. Yes. If that changed too, you wouldn't know what made the difference. It's a control.

2. In the "Does a longer tail keep a kite steadier?" test, which one must stay the same? The same kite. Yes. If that changed too, you wouldn't know what made the difference. It's a control.

3. In the "How much salt does it take to float an egg?" test, which one must stay the same? The same egg. Yes. If that changed too, you wouldn't know what made the difference. It's a control.

4. In the "Does food colouring spread faster in hot water?" test, which one must stay the same? The same amount of water in each cup. Yes. If that changed too, you wouldn't know what made the difference. It's a control.

5. In the "Do plants bend toward the window?" test, which one must stay the same? The same kind of bean, planted the same day. Yes. If that changed too, you wouldn't know what made the difference. It's a control.

6. In the "Where does the most rain land: the open yard, under a tree or by the house?" test, which one must stay the same? The same kind of straight-sided jar for every gauge. Yes. If that changed too, you wouldn't know what made the difference. It's a control.

7. In the "Does a paper clip make a plane fly farther?" test, which one must stay the same? The same folded plane. Yes. If that changed too, you wouldn't know what made the difference. It's a control.

8. In the "How much water makes a bottle flip land best?" test, which one must stay the same? The same bottle with its cap on tight. Yes. If that changed too, you wouldn't know what made the difference. It's a control.