Form 1 Integrated Science Recap

Complete each statement using the most appropriate word, symbol or numerical value.

1. A is used to measure the volume of a liquid more accurately than a beaker.
2. A flask is suitable for swirling and mixing liquids because its narrow neck reduces the chance of spillage.
3. When heating a test tube, its opening should point from yourself and other people.
4. A wire gauze is placed on a tripod to support glassware and spread the more evenly.
5. A is used to transfer a small amount of liquid drop by drop.
6. The volume of a liquid in a measuring cylinder should be read at level to avoid parallax error.
7. For water in a measuring cylinder, the reading is normally taken at the of the meniscus.
8. Fire requires fuel, oxygen and to continue burning.
9. A fire blanket can extinguish a small fire by cutting off its supply of .
10. Water must not be poured onto burning cooking oil because it may cause the burning oil to .
11. If a person’s clothes catch fire, the person should stop, drop and .
12. The SI base unit of length is the .
13. The SI base unit of mass is the .
14. The SI base unit of time is the .
15. Area is a derived quantity, and its SI unit is .
16. The SI derived unit of speed is .
17. The prefix kilo-, represented by the symbol k, means 10.
18. The prefix centi-, represented by the symbol c, means 10.
19. 3.5 km = m.
20. 250 cm = m.

Choose the best answer for each question.

1. A student needs to measure 37 cm³ of water as accurately as possible. Which apparatus should the student use?
   1. Beaker
   2. Measuring cylinder
   3. Conical flask
   4. Test tube
2. Which method gives the most reliable reading of the volume of water in a measuring cylinder?
   1. Look down at the water surface and read the top of the meniscus.
   2. Look up at the water surface and read the bottom of the meniscus.
   3. Keep the eye level with the water surface and read the bottom of the meniscus.
   4. Tilt the cylinder and read the nearest graduation.
3. Which arrangement is most suitable for strongly heating a beaker of water with a Bunsen burner?
   1. Place the beaker directly on the burner.
   2. Support the beaker with wire gauze on a tripod.
   3. Hold the beaker continuously with bare hands.
   4. Place the beaker inside a measuring cylinder.
4. A student wants to evaporate water from a salt solution so that solid salt remains. Which apparatus is most suitable for holding the solution?
   1. Evaporating dish
   2. Measuring cylinder
   3. Dropper
   4. Test-tube rack
5. A student wants to find the mass of a powder without placing the powder directly on the balance. Which procedure is correct?
   1. Find only the mass of the container.
   2. Find the mass of the powder and container, then subtract the mass of the empty container.
   3. Find the mass of the empty container, then add the volume of the powder.
   4. Place the powder directly on the balance and subtract the room temperature.
6. Which action is correct when heating a liquid in a test tube?
   1. Fill the test tube completely.
   2. Point the opening towards another student.
   3. Heat one fixed point continuously.
   4. Move the test tube gently through the flame with its opening pointing away from people.
7. Which Bunsen burner flame is normally used for strong heating?
   1. A yellow luminous flame with the air hole closed
   2. A blue non-luminous flame with the air hole open
   3. A yellow flame produced without gas
   4. A blue flame with no oxygen entering the burner
8. A burning candle is covered completely with a glass jar. Why does the flame eventually go out?
   1. All the wax disappears immediately.
   2. The temperature of the room decreases.
   3. The supply of oxygen becomes insufficient.
   4. The glass removes all the fuel.
9. A small amount of flammable liquid catches fire in a heatproof container. What is the most appropriate immediate action if it is safe to do so?
   1. Carry the burning container outside.
   2. Pour water into the container.
   3. Cover the container with a suitable lid or fire blanket.
   4. Blow strongly at the flame.
10. A student’s clothing catches fire. Which response is most appropriate?
    1. Run quickly to find water.
    2. Stop, drop and roll, while others use a fire blanket if available.
    3. Hide under a laboratory bench.
    4. Remove the safety goggles and continue the experiment.
11. Why should water not normally be used on a fire involving live electrical equipment?
    1. Water always increases the amount of fuel.
    2. Water may conduct electricity and cause an electric shock.
    3. Water contains too little oxygen.
    4. Water has a low temperature.
12. Which row contains a physical quantity and its correct SI base unit?
    1. Length — centimetre
    2. Mass — gram
    3. Time — second
    4. Volume — litre
13. Which of the following is an SI derived quantity?
    1. Mass
    2. Time
    3. Length
    4. Speed
14. Which unit is formed from SI base units?
    1. m s⁻¹
    2. km
    3. cm
    4. min
15. A rectangular laboratory bench has a length of 200 cm and a width of 80 cm. What is its area in m²?
    1. 1.6 m²
    2. 16 m²
    3. 160 m²
    4. 16,000 m²
16. A student walks 2.75 km. What distance does the student walk in metres?
    1. 27.5 m
    2. 275 m
    3. 2750 m
    4. 27,500 m
17. Which expression correctly converts 86 cm into metres?
    1. 86 × 100 m
    2. 86 ÷ 100 m
    3. 86 × 1000 m
    4. 86 ÷ 1000 m
18. Which length is the greatest?
    1. 0.75 km
    2. 720 m
    3. 74,000 cm
    4. 7.3 × 10⁵ mm
19. A student runs 600 m in 5 min. What is the student’s average speed in m s⁻¹?
    1. 2.0 m s⁻¹
    2. 5.0 m s⁻¹
    3. 120 m s⁻¹
    4. 3000 m s⁻¹
20. A liquid has a volume of 2.5 L. Given that 1 L = 1000 cm³, what is its volume in cm³?
    1. 2.5 cm³
    2. 25 cm³
    3. 250 cm³
    4. 2500 cm³

Write True or False for each statement. If a statement is false, rewrite it correctly.

1. A beaker is generally more suitable than a measuring cylinder for measuring an exact volume of liquid.
2. A conical flask can be swirled with a lower risk of spilling its contents than a beaker.
3. A test-tube holder should be used to hold a test tube while it is being heated.
4. A measuring cylinder should normally be held in the hand while its liquid volume is being read.
5. The bottom of the water meniscus should be read with the eye at the same level as the liquid surface.
6. The yellow luminous flame of a Bunsen burner is commonly used as the safety flame because it is easier to see.
7. A fire can continue burning as long as fuel and heat are present, even if there is no oxygen.
8. A fire blanket extinguishes a fire mainly by preventing oxygen from reaching the burning material.
9. Water should be poured onto burning oil because water cools all types of fire safely.
10. A person whose clothes are on fire should run quickly to make the flames go out.
11. Electrical equipment should be disconnected from the power supply, if it is safe to do so, before dealing with an electrical fire.
12. The metre is the SI base unit of length.
13. The gram is the SI base unit of mass.
14. Volume is a base quantity because it can be measured directly using a measuring cylinder.
15. The unit m² is an SI derived unit.
16. The prefix kilo- means one hundred times the original unit.
17. The prefix centi- means one hundredth of the original unit.
18. To convert a measurement from kilometres to metres, its numerical value is multiplied by 1000.
19. Since 1 m = 100 cm, 1 m² = 100 cm².
20. A speed of 1 m s⁻¹ means that an object travels one metre every second.