Year 9 Science Quiz

Question 1

Which of the following are conditions that affect the function of the heart?

Accepted Answer

Blocked blood vessels, Irregular heart rate

Question 2

Simple covalent molecules have low boiling points due to...

Accepted Answer

Few weak intermolecular forces which need to be broken

Question 3

Mendeleev should not have put Silver, Ag, into Group 1 because...

Accepted Answer

Silver has unique chemical properties to Group 1 metals

Question 4

What part of the digestive system is represented by fig. 8?

Accepted Answer

Pancreas

Question 5

Amino acids are the building blocks of...

Accepted Answer

Proteins

Question 6

What is the role of the pancreas in the digestive system?

Accepted Answer

To produce amalyse, lipase and protease enzymes

Question 7

Why do giant structures have high melting points?

Accepted Answer

No weak intermolecular forces present, Many strong bonds/attractions to be broken

Question 8

The current going through the circuit is constant because...

Accepted Answer

Same number of electrons passes through per second, There is only one path the electrons can pass through

Question 9

Each resistor provides 6Ω of resistance. The current through the circuit is:

Accepted Answer

0.67A

Question 10

The extension of the catapult is 0.5m. The elastic has a spring constant of 20N/m. Energy is:

Accepted Answer

2.5J

Question 11

Which of the following statements about pacemakers is false?

Accepted Answer

If the heart pumps too hard, not enough oxygen goes around

Question 12

Which of the following statements about stents is false?

Accepted Answer

Stents have to be put into place using general anaesthetic

Question 13

Which Group of the Periodic Table is Calcium in?

Accepted Answer

2

Question 14

Which of the following is a description of graphite?

Accepted Answer

Giant covalent compound

Question 15

What part of the digestive system is represented by D?

Accepted Answer

Large intestine

Question 16

Calcium is more reactive than Magnesium. This is due to...

Accepted Answer

More electron shells so more electron shielding, Less attraction between positive nucleus and outer electron

Question 17

Fluorine is more reactive than Chlorine. This is due to...

Accepted Answer

More attraction between positive nucleus and outer electron, Fewer electron shells so less electron shielding

Question 18

Which of the following are not caused by the use of fossil fuels?

Accepted Answer

Removal of ozone layer

Question 19

Which of the following might have reduced the energy you use per day?

Accepted Answer

Knowledge of global warming, Use of more efficient technology

Question 20

A food sample contains lipids and proteins. Which food tests would prove positive?

Accepted Answer

Ethanol and water test, Biuret test

Question 21

Which of the following is the least reliable source of energy?

Accepted Answer

Wind

Question 22

If resistance is 8Ω, and voltage is 200V, what is the current?

Accepted Answer

25A

Question 23

Diamond is harder than graphite because..

Accepted Answer

Diamond is only bonded by strong covalent bonds, Graphite layers, held by weak forces may break and slide

Question 24

How could global warming be reduced without reducing fossil fuel usage?

Accepted Answer

Plant more trees to absorb carbon dioxide

Question 25

Why might people need to use both solar and wind energy at the same time?

Accepted Answer

Wind and solar output levels are inconsistent, Neither wind nor solar produce enough energy to meet demand

Question 26

Both the driver and the car have a store of which energy type?

Accepted Answer

Gravitational Potential, Chemical

Question 27

Why did you assign Calcium to that Group?

Accepted Answer

Number of outer electrons

Question 28

If the man lets go, what energy transfer will occur?

Accepted Answer

GPE ⇨ Kinetic + Thermal + Sound

Question 29

Mendeleev's Periodic Table was better than Newland's table because...

Accepted Answer

Newland's table did not have periodicity, Mendeleev left gaps for undiscovered elements

Question 30

The tomato has a mass of 10g. The velocity of the tomato is 0.5m/s. The kinetic energy is:

Accepted Answer

1.25J

Question 31

Which of the following facts about series circuits is false?

Accepted Answer

The total resistance in the circuit is R = 1/R + 1/R2 + 1/R3

Year 9 Science Quiz

Questions 31

Year 9 Science Quiz

Questions 31