Science 10 QUIZBEE

Which electromagnetic wave has a higher frequency than infrared rays but lower frequency than ultraviolet rays?

• Gamma ray

• Microwave

• Visible light

• X-Ray

Acid rain is known to have damaging effects on humans, environment, structures  and many others. The following are are harmful effects of acid rain, except

• production of pesticide.

• destruction of statues.

• corrosion.

• death to aquatic life

Which statement about the parts of the eye and their uses is true?

• The pupil opens or shuts the eye.

• The eyelid regulates the amount of light.

• . The iris enables the eye to see near object.

• The Iris serves as the screen where the image is formed.

.If you placed a number chart in front of a plane mirror, what numbers will you read properly in the mirror?

• 0, 1, 6, 8, and 9 

• 0, 1and 6

•  0, 8, and 1

• 0 and 9

You see your face clearly if you look down on a pool of still water. Which one of the following statements gives the best explanation for this observation?

• . Light entering the water is dispersed.

• Regular reflection of light happens on the surface of still water.

• Irregular reflection of light happens on the surface of still water.

• Light is reflected from the surface of water in different directions

The wings of the bat and the fore-limbs of the dog are said to be homologous structures. This indicates that

• They have a different ancestry but a common function

• Bats evolved from a lineage of dogs

• They are structures which are similar due to common ancestry

• The limb bones of each are anatomically identical

A DNA strand with the sequence AAC-GTA-ACG is transcribed. What is the sequence of the mRNA molecule synthesized?

              

• AAC-GTA-ACG

• UUG-CAU-UGC

• AAC-GUA-ACG

• TTG-CAT-TGC

What happens to the energy of an electromagnetic wave if its frequency increases?

• decreases

• doubles

• increases as well

• remains the same

Which of the following statements correctly explains why microwave ovens strongly heat food inside them but do not strongly heat the glass plates that the food rests on?

• A. Microwaves are more strongly absorbed by water molecules than by molecules in glass.

• B. Glass emits microwaves more easily than it absorbs them.

• C. Food has a higher density than glass so it absorbs more microwave energy.

• D. Glass reflects microwaves better than food does.

Why it is easier to read a newspaper than a glossy magazine?

• Because incident rays of light on a newspaper reflect in different directions while incident rays of

      light on a glossy magazine reflect in only one direction.

• Because incident rays of light on a newspaper reflect in only one direction while incident rays of

      light on a glossy magazine reflect in different directions

• Because incident rays of light on a glossy magazine converge at the focus.

• Because incident rays of light on a newspaper converge at the focus.