Question 1

Energy from the sun to heat water. The heater’s panelis painted black to :

Accepted Answer

Improve absorption of infrared radiation

Answer

Reduce the heater’s conducting properties

Answer

Reduce the heat loss by convection currents

Answer

Improve emission of infrared radiation

Question 2

In DNA, which of the following determines thetraits of an organism?

Accepted Answer

Sequence of nitrogen bases

Answer

Strength of hydrogen bonds

Answer

Amount of adenine

Answer

Number of sugars

Question 3

How does a lens work?

Accepted Answer

It forms an image by refracting light

Answer

It takes a picture with a digital camera and tags it on Facebook for you to see

Answer

It forms an image by diffusing light

Answer

It forms an image by diffracting light

Question 4

If you have a ten percent off coupon for a a20-peso item, how much will the item cost?

Accepted Answer

18pesos

Answer

15pesos

Answer

10pesos

Answer

19pesos

Question 5

If you had 23 pens, threw away five, then found two more, how many pens do you have now?

Accepted Answer

20

Answer

26

Answer

16

Answer

30

Question 6

If Billy sells lemonade for 15 pesos and has 50customers, how much money does he make?

Accepted Answer

750pesos

Answer

100 pesos

Answer

500 pesos

Answer

75 pesos

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