CE Daily Challenge #01

What is What is the best description of DIGESTION?

select 2…

• breaking down food

• eating

• egesting waste

• absorbing nutrients into the blood

Answer explanation

DIGESTION is the breaking down of large pieces of food int small soluble nutrients and absorbing them into the blood (thorugh the villi)

Which organelle is responsible for PHOTOSYNTHESIS?

• mitochondria

• ribosomes

• chlorosplast

• nucleus

Answer explanation

CHLOROPLASTS hold the chemical chlorophyll (containong Magnesium) which allows the plant cells to capture light energy...

What would you see if an IRON nail is put into blue COPPER SULFATE?

select 2

• brown rust appears

• brown copper appears

• the solution gets lighter

• fizzing

Answer explanation

Iron + Copper Sulfate --> Iron Sulfate + Copper

solution goes from blue --> lighter green

and pinky brown copper appears...

Which ELEMENT is found in all ACIDS?

• Chlorine

• Oxygen

• Carbon Dioxide

• Hydrogen

Answer explanation

eg Hydrochloric acid - H.Cl - all acids contain a HYDROGEN ION...

What is the best description of SOUND?

• noise

• vibrations

• waves

• echos

Answer explanation

sounds armade by objects vibrating

Which of these are sources of RENERABLE ENERGY?

Select 2

• Coal

• Wood

• Solar

• Natural gas

• Crude Oil

Answer explanation

RENERABLE ENERGY sources are EASILY REPLACED IN OUR LIFETIME...

Change 40kg into a WEIGHT…

40Kg = *N

Answer explanation

F = 40 x10 = 400N

How could we make an investigation RELIABLE?

• measure carefully

• have the same person doing all the measurements

• write down the control variables to make it a fair test

• repeat the tests

Answer explanation

Repeating / carrying out more tests will help spot / identify issues or mistakes