CE Daily Challenge #03

What are the products of PHOTOSYNTHESIS?

select 2

• carbon dioxide

• oxygen

• water

• glucose

• sunlight

Answer explanation

carbon dioxide + water {with sunlight} → GLUCOSE + OXYGEN

What do the ARROWS show in a food chain?

• the apex predators

• the trophic levels

• who is a carnivore

• flow of energy

What is the gas produced when MAGNESIUM is put into SULFURIC ACID?

• oxygen

• carbon dioxide

• hydrogen

• sulfur dioxide

Answer explanation

All acids contain HYDROGEN... eg Hydochloric acid - H.Cl

What method is used to collect WATER from SEA WATER?

• evaporation

• distillation

• filtration

• sieving

Answer explanation

Evaporate and then condense the water (leaving the salt behind) = DISTILLATION

What is meant by RESISTANCE in an electrical circuit?

• the direction of the flow electrical current

• the power of the cells / battery

• how much the electricity is being stopped

• how easy it is for a current to flow in a SERIES circuit

Answer explanation

RESISTANCE is how much components slow down (or even stop) the flow of the electrical current - think VARIABLE RSISTOR...

What is a potential problem with most NON-RENEWABLE energy sources?

• not efficient

• carbon dioxide / global warming

• sulfur dioxide / acid rain

• they will run out

Answer explanation

Not efficient / not reliable (not always windy, sunny, etc), also set up costs and location can be an issue...

Calculate the the volume of a block with a density of 2g/cm³ and a mass of 10g.

Do not include the units of cm³

Answer explanation

DiMoV - V = M/D = 10/2

In an investigation measuring the speed of runners in a 100m race, what would the DEPENDENT VARIABLE be?

• distance

• time

• the different runners

• the weather conditions