Form 2 Science UASA Section A (Set 2)

Diagram 1 shows three organisms. The similarity of the organisms above is

• warm blooded

• lay egg

• nursing their youngs

• undergo internal fertilisation

Diagram 2 shows a water heater that uses a solar panel. What can be done to reduce the heat loss from the water in the tank at night?

• Unplug the pump connecting solar panel and tank

• Increases the volume of cold water

• Connect the tank to an electric source

• Cover the tank with a thick cloth

Two similar balloons hang side by side. Both balloons are rubbed with wool cloth. Which diagram shows the condition of the balloon after being rubbed?

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Which of the following statements about enzyme is not correct?

• Bile juice is not an enzyme.

• Protease enzyme digests maltose into glucose.

• Lipase enzyme digests fat into fatty acids and glycerol.

• Amylase enzyme digests starch into maltose.

Diagram 3 shows an electric circuit. What is the reading of the ammeter?

• 3.0 A

• 0.1 A

• 1.5 A

• 2.0 A

A polythene rod is rubbed with a cloth. The rod becomes positively charges because of the movement of electric charges. Which of the following pairs shows the correct direction of the charge movement?

• Electron - From cloth to rod

• Electron - From rod to cloth

• Proton - From cloth to rod

• Proton - From rod to cloth

Diagram 4 shows levers J, K and L. Choose the correct statement based on the diagram above.

• Least effort is needed for lever J

• Least effort is needed for lever L

• More effort is needed to lift up rock in lever K than in lever J

• The least effort is needed when the distance of effort to fulcrum is equal to the distance of load to fulcrum

A straight conductor is connected to a power supply as shown in diagram 5. The direction of magnetic field created can be determined using

• Bar magnet

• Solenoid

• Right hand grip rule

• Determining whether the current is flowing clockwise or anti-clockwise

Table 1 shows the distances of Neptune and the Earth from the Sun. Given that the Earth's distance from the Sun is 1.5x10⁸ km, find the distance between Neptune and the Earth, in km.

• 4.05 x 10^-9 km

• 4.35 x 10⁹ km

• 4.5 x 10⁹ km

• 4.65 x 10⁹ km

Bellatrix is a very hot star with temperature of 21 500K. Its colour is

• Yellow

• White

• Bluish-white

• Red