1. Lamps in your house are often connected in parallel. What makes this a good idea?

A. A parallel connection is safe and simple to design.
B. Parallel circuit has one or more connections which can be switched off separately and saves electricity
C. Each bulb does not receive the same amount of voltage supplied by the electric source.
D. If one of the bulbs is burnt, other bulbs would continue to light up.

2. The relationship between the strength of an electromagnet and the number of coils is directly proportional. This means that

A. As the number of coils increases, the strength of the electromagnet decreases.
B. The more coils of wire, the stronger the electromagnet becomes results to more metals to be attracted.
C. The strength of an electromagnet depends on the number of coils of wire. D. Electromagnets are magnets that work by means of electric current and it is made up of wires wound into a coil

3. Which statement best describes mechanical weathering that results to soil formation?

A. Human activities like soil cultivation and road construction break rocks that result in the formation of soil.
B. Changes in temperature make rocks to contract and it also makes rocks to expand.
C. The roots of the plants strengthen the rocks.
D. Some animals may burrow underground that results in weathering.

4. One of the human activities is building roads and tunnels using heavy equipment and machinery. What do you think will happen to rocks if this human activity is continuously done?

A. Weathering will continuously occur.
B. Rocks will not break.
C. Weathering is the breaking of rocks and it is also a process that causes soil formation.
D. Rocks will break and turn into small pieces because of the constant building of roads and tunnels.

5. Which statement describes the effect of soil erosion on living things?

A. Trees are uprooted during soil erosion.
B. Soil erosion is the transfer of soil from one place to another that affects the growth of the plants which becomes unhealthy due to washed top soil.
C. Eroded soil may clog waterways that result in flooding.
D. Increase crop harvest.

6. How does soil erosion affect plans in our environment?

A. It prevents see growth
B. Plants grow unhealthy and they will have difficult holding onto the eroded soil.
C. It makes the topsoil fertile.
D. Soil erosion is the transfer of soil from one place to another that affects soil fertility which results in low crop harvest.

7. Which best describes the affect of typhoon on physical structures?

A. Enough supply of electricity.
B. Flood can destroy infrastructures
C. Buildings, bridges ang roads are destroyed which makes the transportation of food and medical supplies dificult.
D. Houses are submerged in flood waters and the roofs and walls of some houses are damaged.

8. What is the importance of constellation to humans?

A. They served as guides to forecast weather and when to plant And harvest plants.
B. They served as guide for farmers when to plant crops while navigators used them to determine direction accros oceans.
C. They can help astronomers to predict future events.
D. They are used by our ancestors to mark the passing of time.

9. Polaris is the one of the stars in the constellation of Ursa minor. What is the importance of Polaris in finding directions?

A. It is called the North star because it's position remained the same on the northern hemisphere all year round
B. It is the only star that moves in the sky.
C. It is brightest star in the constellation Ursa minor.
D. it is directly above the North Pole which helps navigators determine direction in the open sea. ​