Form 2 Science UASA Section A (Set 1)

Diagram 1 shows a graph of antibody in blood against weeks for measles. After the second injection, white blood cells will produce antibody that is

• Larger in quantity

• Stronger

• Live longer

• Larger in size

Sarah added salt into a glass of water and found out that the salt become sediment at the bottom of the glass after being stirred. Which of the following may help her to increase the solubility of the salt?

I Use hot water

II Add more water

III Increase the size of salt

IV Stir using a larger spoon

• I and II

• I and III

• II and III

• All of the above

Which of the following characteristics is affected by the distance of planets from the Sun?

• Number of natural satellites of planets

• Mass of planets

• Surface temperature of planets

• Density of planets

Diagram 2 shows a circuit consists of three ammeters, X, Y and Z connected to 9V power supply. Which ammeter shows the largest reading?

• X

• Y

• Z

• They all have the same reading

Which of the following statements is not true about energy?

• Energy is needed to do work.

• Unit for energy is Newton.

• Energy cannot be created.

• Sound energy is created by vibrating object.

Which of the following lever is balanced?

• I and II

• I and III

• II and IV

• III and IV

Diagram 3 shows an investigation conducted by Mazni. Mazni weighed a small object using spring balance and recorded a reading of 0.67N. Next, she put the small object into water and weighed it again. The reading recorded is 0.4N. How much is the buoyant force exerted on the object when it was in the water?

• 1.07 N

• 0.28 N

• 0.27 N

• 1.68 N

Diagram 4 shows an experiment set up to investigate the relationship between water pressure and depth. Which of the following statements is true about the experiment?

• Point A receives the most pressure because it is closest to the atmosphere.

• Point C receives the most pressure because of its lowest position.

• Point B receives a balance pressure between the atmosphere and the base of the container.

• Point C shoots out the furthest water because of its highest gravitational force

Which of the following is true about land breeze?

• It occurs during daytime.

• It blows from the sea to land.

• It occurs because the land heats up faster than the sea.

• It occurs because the sea is warmer than the land.

• W

• X

• Y

• Z