Std6 Science Test 2

Which of the following is not a traditional scientific practice in Botswana?
1. Fermentation
2. distillation
3. vaccination
4. pottery
The telephone was invented by
1. Thomas Eddison
2. Alexander Graham Bell
3. Charles Darwin
4. Louis Pasteur
What is the original source of energy in any food chain?
1. Plants
2. Sun
3. consumers
4. herbivores
The animals below are protected in Botswana except ________________.
1. Kori bustard
2. giraffe
3. rabbit
4. rhinoceros
Which one of these is responsible for global warming?
1. Oxygen
2. carbon dioxide
3. Nitrogen
4. hydrogen
When paint is put in paraffin it dissolves. The paint is called a _____________________.
1. Solute
2. solvent
3. solution
4. suspension
What energy change occurs when a candle burns?
1. chemical-light
2. Electrical-kinetic
3. Kinetic-heat
4. Heat-chemical
Which of the following substances contain an acid?
1. Bottled water
2. Milk of magnesium
3. sugar solution
4. Orange juice
Which statement is true?
1. As the temperature decreases, the rate of dissolving increases.
2. As the temperature increases, the rate of dissolving decreases.
3. As the temperature increases, the rate of dissolving increases
4. The rate of dissolving does not depend on increase in temperature.
The following factors can affect the ability of a solvent to accept more solute except ___________________________.
1. Color of the solute
2. Temperature of the solvent
3. The size of the particles of the solute
4. The amount of stirring
Which chemical symbol is used to present Copper?
1. Ca
2. Cr
3. Cu
4. Cs
Which of the following powdered solids would form a suspension with water?
1. Chalk
2. Sugar
3. table salt
4. Coffee
Which of the following sources is most likely to contain the hardest water?
1. River
2. borehole
3. dam
4. pan
If the melting point of ice is 0^oC, the freezing point is
1. 100 ^o C
2. 0 ^o C
3. 50 ^o C
4. 25 ^o C
The only metal that is liquid at room temperature is ________________________.
1. Copper
2. Oxygen
3. Mercury
4. Carbon
Separating a mixture by carefully pouring out the liquid without disturbing the solid on the bottom of the container is called ___________________________.
1. Filtration
2. magnesium
3. distillation
4. decantation
Heat can be transferred from one place to another through ________________________.
1. Conservation, Movement, Conduction
2. Conduction, Convection, Radiation
3. Filtration, Convection, Sedimentation
4. Flocculation, Radiation, Sterilization
The Normal is an imaginary line drawn at ________________ to the surface of the mirror.
1. 45 C
2. 90 C
3. 180 C
4. 100 C
The following are all properties of acid except ___________________.
1. Taste Sour
2. Can be corrosive
3. Taste bitter
4. Have a strong, sharp smell
If the Ph is 0 to 3 the substance is a _________________.
1. Strong alkali
2. Strong acid
3. Weak acid
4. Neutral
Which list shows examples of third class levers?
1. Crow bar, scissors, pliers
2. Wheelbarrow, nutcracker, seesaw
3. Hammer, tweezers, a person’s arm
4. Spade, secateurs, nutcracker
One can soften hard water by __________________.
1. Freezing
2. covering
3. adding more soap
4. evaporating
There are times when the moon blocks the rays of the sun from reaching the earth. This situation is called ________________.
1. Total eclipse
2. Partial eclipse
3. solar eclipse
4. Lunar eclipse
A __________________is NOT an example of streamlining design.
1. Plane
2. boat
3. ship
4. sledge
To which of the following does sodium bicarbonate belong?
1. Strong alkali
2. Weak alkali
3. Strong acid
4. Weak base
A substance turns a red litmus paper to blue is a/an _________________.
1. Alkali
2. Acid
3. Neutral
4. Vinegar
Which optical instrument does not use lenses?
1. Camera
2. Binoculars
3. Periscope
4. Telescope
A mirage occurs because ____________________________.
1. There is water on the ground
2. light of the sky is refracted by layers of hot and cool air
3. light from the sun is reflected by layers of hot and cool air
4. The ground is hot.
Which process is used to obtain table salt from a salt water solution?
1. Filtration
2. sieving
3. boiling
4. using a magnet
What is meant by phases of the moon?
1. The solar eclipse
2. The nine planets
3. The different shapes of the moon
4. Rotation of the moon around the earth