KS 3: Online Science Quiz

KS 3: Online Science Quiz

LWS 2022 Activities Week

Round 1

Chemistry

Multiple Choice

Which of the following pH numbers indicate a strong alkali?

• 1

• 5

• 9

• 14

Multiple Choice

Strong acids and strong alkalis are.......

• Able to turn blue litmus paper red

• Corrosive and/or caustic

• Sour

• Sweet

Multiple Choice

When zinc carbonate reacts with dilute hydrochloric acid the products are:

• carbon dioxide, water

• zinc chloride, carbon dioxide

• zinc chloride, carbon dioxide, water

• zinc sulfate, carbon dioxide, water

Multiple Choice

Which of the following acids do we have in our stomach?

• Ethanoic acid

• Hydrochloric acid

• Nitric acid

• Sulfuric acid

Multiple Choice

What colour is universal indicator in a neutral solution?

• Green

• Orange

• Purple

• Red

Multiple Choice

Which of the following substances contain an alkali?

• Baking powder

• Coca cola

• Distilled water

• Vinegar

Multiple Choice

A pure substance in which all of the atoms are identical is a description of .......

• a compound

• a mixture

• an alloy

• an element

Multiple Choice

In the periodic table, the elements are arranged in order of increasing .......

• alphabetical symbol

• electron number

• mass number

• proton number

Multiple Choice

Lithium floats on water as it .......

• is a stubborn element

• is a solid

• is less dense than water

• is more dense than water

Multiple Choice

The name of the element with the symbol Na is .......

• napthalene

• neon

• nickel

• sodium

Multiple Choice

In the following reaction which are the products Mg + 2HCl → H2 + MgCl2?

• Hydrochloric acid and magnesium chloride

• Hydrogen and magnesium chloride

• Magnesium and hydrochloric acid

• Magnesium and hydrogen

Multiple Choice

If you reduce the volume of a gas .......

• It expands

• It gets bigger

• The pressure increases

• The temperature falls

Multiple Choice

The number of different elements in calcium carbonate (CaCO3) is .......

• 2

• 3

• 4

• 5

Multiple Choice

Where are the non-metallic elements found in the periodic table?

• In the middle

• In the top rows

• On the left-hand side

• On the right-hand side

Round 2

Biology

Multiple Choice

Iodine solution is a yellow-brown colour and is used to test for starch. If starch is present what colour does the iodine turn?

• blue-black

• milky

• orange-red

• purple

Multiple Choice

Which one of the following shows discontinuous variation?

• Eye colour

• Height

• Strength

• Weight

Multiple Choice

Which of the following is a job carried out by the liver?

• Absorbs water from the gut

• Makes bile

• Makes amylase

• Stores fats and glycerol

Multiple Choice

The small molecules are absorbed into the blood in the .......

• large intestine

• pancreas

• small intestine

• stomach

Multiple Choice

Fats are stored .......

• in the large intestine

• in the pancreas

• in the stomach

• under the skin

Multiple Choice

The small intestine has special structures, called villi, which help absorption of digested food. Which of the following is NOT a feature?

• Good blood supply

• Impermeable walls

• Large surface area

• Thin layer of cells

Multiple Choice

Glucose is stored in the .......

• liver

• pancreas

• small intestine

• stomach

Multiple Choice

What does the large intestine do?

• Absorbs digested food into the blood

• Absorbs water from the gut

• Makes bile to break down fats

• Makes enzymes

Multiple Choice

Which of the following is NOT present in an animal cell?

• Cell membrane

• Cell wall

• Cytoplasm

• Nucleus

Multiple Choice

What is a feature of a ciliated cell?

• Contains haemoglobin

• Has a tail

• Has branches at the end

• Has hairs

Multiple Choice

Which of the following receives, carries and passes on electrical impulses?

• Muscle cells

• Neuron cells

• Red blood cells

• White blood cells

Multiple Choice

What is the function (job) of red blood cells?

• To transport glucose

• To transport minerals

• To transport oxygen

• To transport water

Round 3

Physics

Multiple Choice

An electromagnet on a crane is used in a scrapyard because:

• It can be turned on and off

• It can't be turned on and off

• It is stronger than a permanent magnet

• It is weaker than a permanent magnet

Multiple Choice

A cyclist has a speed of 10 km/h. She cycles for 120 minutes - how far does she go?

• 10 kilometres

• 12 kilometres

• 20 kilometres

• 1,200 kilometres

Multiple Choice

 In order to measure the current flowing through a bulb in a circuit, the ammeter is connected in:

• Not connected in the circuit

• parallel with the battery

• parallel with the bulb

• series with the bulb

Multiple Choice

A four legged table exerts a pressure of 8,000 Pa on the ground. Each leg has an area of 0.01 m2. What is the weight of the table?

• 32 N

• 80 N

• 320 N

• 320 kg

Multiple Choice

If more bulbs are added in series in a series circuit:

• less current flows

• more current flows

• no current flows

• there is no change in current flow

Multiple Choice

In order to measure the voltage across a bulb in a circuit, the voltmeter is connected in:

• Not connected in the circuit

• parallel with the battery

• parallel with the bulb

• series with the bulb

Multiple Choice

What is the unit of electric current?

• Ampere

• Ohm

• Volt

• Watt

Multiple Choice

Wires are usually coated in plastic because:

• plastic can be lots of different colours

• plastic helps the wires bend

• plastic helps the wires conduct electricity

• plastic is an insulator

Multiple Choice

Which is the MAIN energy transfer when a wind-up clockwork toy is released?

• Elastic → kinetic

• Elastic → potential

• Kinetic → elastic

• Kinetic → sound

Multiple Choice

Which type of energy is given out by a luminous object?

• Kinetic

• Light

• Potential

• Sound

Multiple Choice

Which of the following statements about unbalanced forces is NOT true?

• They can change the direction of a moving object

• They can slow down an object

• They have no effect on an object

• They speed up an object

Multiple Choice

What is weight measured in?

• Joules

• Kilograms

• Newtons

• Pascals

Multiple Choice

Which of the following is NOT a touching force?

• A push

• Air resistance

• Friction

• Magnetism

Multiple Choice

On Jupiter, 1kg weighs approximately 25 newtons. What would be the weight of 100g?

• 0.25N

• 2.5N

• 250N

• 2500N

Multiple Choice

Which of the following statements about balanced forces is NOT true?

• A moving object will continue to move at constant speed

• A stationary object will not move

• They are the same size acting in the opposite direction

• They are the same size acting in the same direction

Congratulations!

Kindly relax and wait for your result. Thank you.