Bio

Anything occupy space and have mass is

• Matter

• Magnet

• Aeroplane

• Solution

Chose all that apply. What are some unique properties of water?

• It can freeze and boil.

• High specific heat.

• Cohesion.

• Adhesion.

The internal pH of most cells in the human body must be kept between ____________.

• 5.5 and 7

• 7.1 and 7.5

• 6.5 and 7.5

• 7 and 10

The yellow particles represented here are the:

• neutrons

• electrons

• protons

• nucleus

Which of the following is TRUE about acids and bases?

• The pH scale ranges from 0-14, with acids ranging from 0-7 and bases ranging from 7-14.

• Acids produce more H+ ions in water.

• Bases produce more OH- ions in water.

• All of the above are true!

What allows bodies of water, like lakes and oceans, to absorb large amounts of heat with only small changes in temperature?

• capillary action

• covalent bonds

• high heat capacity

• ionic bonds

Chemical interference of gold minerals is mainly caused by which minerals??

The reaction depicted by this graph is __________.

• exothermic
• endothermic

The reaction depicted by this graph is ____.

• endothermic
• exothermic

In ........., .............., and .......... the iron sulphide minerals are oxidised to create sulphur dioxide gas.

• roasting, pressure oxidation and bio-oxidation

• roasting, pressure oxidation and leaching

• roasting, fine grinding and bio-oxidation

• roasting, pressure oxidation and fine grinding