Page 13 - Elfin Fly_3
P. 13
Experiment
Why?Why? Why?
Deserts are hot in the daytime, and
they become cold in the nighttime. Why? Let’s find out!
What We Need 1 Put 2 bags of sand into the plastic box.
1 plastic box, 2 Put the lamp right above the plastic box.
2 bags of sand,
1 lamp, 3 Post the thermometer in the sand.
1 thermometer
4 Turn on the lamp, then measure the
temperature every 20 minutes. (5 times)
5 Turn off the lamp, then measure the
temperature every 20 minutes. (5 times)
Draw Conclusion
In the experiment, when the lamp is on, it is daytime. And when
the lamp is off, it is nighttime.
up hot down cold
In daytime, the sand temperature goes , so it is
very . In nighttime, the sand temperature goes
, so it is very .
10
Why?Why? Why?
Deserts are hot in the daytime, and
they become cold in the nighttime. Why? Let’s find out!
What We Need 1 Put 2 bags of sand into the plastic box.
1 plastic box, 2 Put the lamp right above the plastic box.
2 bags of sand,
1 lamp, 3 Post the thermometer in the sand.
1 thermometer
4 Turn on the lamp, then measure the
temperature every 20 minutes. (5 times)
5 Turn off the lamp, then measure the
temperature every 20 minutes. (5 times)
Draw Conclusion
In the experiment, when the lamp is on, it is daytime. And when
the lamp is off, it is nighttime.
up hot down cold
In daytime, the sand temperature goes , so it is
very . In nighttime, the sand temperature goes
, so it is very .
10
