Chlorine is added into water for public water supplies. What is the purpose of the addition of chlorine?

Which of the following substance is used to produce artificial rain ?

In the making of canned food, why tin is chosen instead of zinc to be electroplated onto the surface of iron

can ?

In stratosphere layer, there is a type of gas that functions to filter off the ultraviolet light present in sunlight to protect the living things from the harmful radiation. What is this gas ?

- Mature ovary of a plant , - Developed from a flower

Which of the following has the above characteristics?

Light years is the unit to measure ……..…. ?

If a person’s diet is deficient in citrus fruits, he or she might be at risk for

Cold pack is used to cover the forehead of kids when they have fever. What is the chemical used in cold pack ?

“A rainbow is an optical and meteorological phenomenon that is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky”

Arrange the color of rainbow from longer wavelength to shorter wavelength.

The diagram below shows the appearance of an object in the sky that was observed from Earth during the month of September.

The object being observed was most likely ………… .

The map below shows some weather conditions occurring at different locations in the United States on a certain day.

Which two conditions show on the map are forms of precipitation?

The photograph below shows a waterfall.

Which two processes are occurring when rock particles are carried over the cliff by the waterfall and then settle in another area ?

Which type of energy needs to be removed from liquid water to change the liquid water to solid water ?

Many organisms live in the forest . The taller trees in the forest are often cut down for wood .

How can this change in the environment be helpful to plants ?

A prairie dog whistles loudly when it senses danger. when it whistles, all of the prairie dogs nearby

run and hide in their burrows.

Which senes helps the other prairie dogs receive this warning ?

After chewing and swallowing , Which body part food goes to …………… ?

How many populations of organisms are there in the leaf litter community?

Study the classification table below.

Which of the following pairs of animals has been wrongly classified ?

Look at the picture. Which of the following are not a structural adaptation of the rabbit to help it escape from its predators ?

There are four same-sized balls made of different materials. Arrange them according to the ball which has the least amount of gravitational force acting on it to the one with the greatest amount of gravitational force acting on it .

Study the Van diagram.

Which of the following is most likely to be object X ?

Study the diagram.

Which of the following is a characteristic of the fruit or seed of

Plant A ?

Look at the picture.

John uses a stick to stir the water in the tank. What observations would he be able to make ?

Simon wanted to find out how fast water could pass through four types of soil. He set up the experiment as show in the picture.

Which type of soil is the least suitable for a cactus to grow in ?