WorksheetsRed light, Blue light
Total questions: 6
Worksheet time: 4mins
Name
Class
Date
1.
(a) is our largest source of blue light.
2.
How long do the average adult spend looking at the screen a day?
a)
11 hours
b)
10 hours
c)
9 hours
d)
8 hours
3.
What does"tough luck"mean? (複選)
a)
what a shame!
b)
what a bad hair day!
c)
Today is not my day.
d)
What rotten luck!
4.
______are used by the scientists to perform the experiments of blue light in the lab.
a)
Monkeys
b)
Cockroaches
c)
Rats
d)
Mice
5.
The screens on tablet or cell phone project ______.
a)
red light
b)
blue light
6.
If Tom goes to bed at 10:00 p.m., what time is the best time for him to put his cell phone away from him?
a)
11:00
b)
9:00
c)
5:00
d)
7:00
100 %
