Science news

DIRECTIONS: Read the Science News section on pages 4 to 7. Then, test your knowledge by filling in the letters of the correct answers below.

1. Harvard scientists tested the DNA of the Rafflesia arnoldii to

(A) find ways to protect the endangered plant.

(B) find its nearest relatives.

(C) learn why it has a rotten smell.

(D) learn why it's so large.

2. The mitochondria's main function is to

(A) help a cell duplicate.

(B) help a cell move.

(C) produce energy for a cell.

(D) keep a cell's wall from rupturing.

3. In 2005, almost--percent of American high school seniors had taken a high school physics class.

(A) 20

(B) 25

(C) 35

(D) 50

4. What's the red squirrel's favorite food?

(A) pine nuts

(B) acorns

(C) spruce seeds

(D) pumpkin seeds

5. Red squirrels usually give birth to--litter(s) of babies in the spring. But if they predict a larger crop of food to come in the summer, they would give birth to--extra litter(s).

(A) one, one

(B) one, two

(C) two, one

(D) two, two

6. Today, NASA does not use which of the following measurements?

(A) liters

(B) miles

(C) meters

(D) kilograms

7. To help deployed troops stay healthy, scientists attached nanoparticles that contain--to soldiers' T-shirts and undergarments.

(A) medicine

(B) bleach

(C) detergent

(D) aromatherapy oils

8. The nanoparticles that scientists attached to soldiers' T-shirts were as tiny as--the width of a human hair.

(A) 100th

(B) 250th

(C) 500th

(D) 1,000th

9. The World Ice Golf Championship takes place on

(A) icebergs.

(B) glaciers.

(C) ice floes.

(D) a frozen lake.

10. Wind-carved snow ridges are called

(A) polynya.

(B) hummock.

(C) frazil.

(D) sastrugi.

ANSWERS

1. b 2. c 3. c 4. c 5. a 6. b 7. b 8. d 9. a 10. d

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