SCIENCE GENERAL WORKSHOP

1. The picture shows an example of

• A. refraction of light.

• B. reflection of light.

• C. straight light.

• D. dispersion of light.

2. The picture which is NOT an example of

bioluminescence is

• 
• 
• 
• 

3. According to the picture, if you change the switch for other material, the material that will light the bulb is

• A. wood.

• B. plastic.

• C. copper.

• D. glass.

The mix between sugar and water is a reversible change. Students could prove that affirmation because

• sugar changes the form.

• they could separate the sugar and the water.

• water changes the taste.

• they could not separate the mix.

5. We can NOT see the whole giraffe because

• light does not go through opaque objects.

• light goes through a little bit translucent objects.

• light goes through a little transparent objects.

• light goes through opaque objects.

6. We can say that the picture below is representing the melting of chocolate because

• A. is changing from solid to gas.

• B. is changing from liquid to solid.

• C. is changing from liquid to gas.

• D. is changing from solid to liquid.

7. A group of students of 3° grade make an experiment mixing baking soda with lemon juice and colorants. The students conclude that it was a chemical change because

• A. lemons change the form.

• B. lemons change color.

• C. change was reversible.

• D. change was irreversible.

8. According to the picture, children are experimenting with pieces of paper. They made different changes to them. The question that can be answer for all of them using one of their 5 senses is

• A. does the paper change the color?

• B. does the paper change the smell?

• C. does the paper change the size?

• D. does the paper change the texture?

9. Jane has to choose the best conclusion for an experiment. She is going to use the results presented above to identify the best one.

According to the results, the best conclusion is

• A. light bounces when it separates in the mirror.

• B. light refracts and it bounces in the mirror.

• C. light separates when it passes through the mirror.

• D. light bounces when it hits against the mirror

10. If the lion population disappears in the food chain below, the population of foxes would

• decrease.

• increase

• die

• stay the same