Digestion & Human Body
Which type of teeth is mainly used to grind food?
Molars
Which state of matter has weak attractive forces between particles?
Gas
Which subatomic particle has a positive charge?
Proton
What is a compound?
A substance made of two or more elements chemically combined.
What is a solute?
The substance that dissolves.
Which organ produces bile?
Liver
What process changes a liquid into a gas?
Evaporation
Which particle has no charge?
Neutron
What is a mixture?
Two or more substances mixed together without chemical bonding.
What is a solvent?
The substance that dissolves the solute.
Which organ secretes digestive juice containing enzymes?
Pancreas
What process changes a gas into a liquid?
Condensation
Which particle moves around the nucleus?
Electron
Which is formed by a chemical reaction: compound or mixture?
Compound
What is a solution?
A mixture formed when a solute dissolves in a solvent.
What is the main function of bile?
It helps digest fats.
Why can gases be compressed?
Their particles are far apart.
What is an atom?
The smallest particle of an element.
Can mixtures be separated by physical methods?
Yes
What is filtration used for?
To separate an insoluble solid from a liquid.
Which organ absorbs most nutrients from digested food?
Small intestine
What happens to particles when a solid melts?
They gain energy and move more freely.
Which element is used to disinfect swimming pools?
Chlorine
Why is iron sulfide no longer magnetic?
Iron chemically combines with sulfur to form a new substance.
What is the solid left on the filter paper called?
Residue
Which organ pumps blood around the body?
Heart
Which state of matter has particles that vibrate in fixed positions?
Solid
Which element is used in advertising signs?
Neon
What is the word equation for iron reacting with sulfur?
Iron + Sulfur → Iron sulfide
What is the liquid collected after filtration called?
Filtrate
Which organ removes waste from the blood?
Kidneys
Which state has a fixed shape?
Solid
Which element is used in light bulbs?
Argon
What holds atoms together in a compound?
Chemical bonds
Which method separates salt from salt solution by collecting the water?
Simple distillation
Which organ controls the body's movements and activities?
Brain
Which state takes the shape of its container but has a fixed volume?
Liquid
Which element is found in limestone?
Calcium
Give one example of a compound.
Magnesium oxide (or Iron sulfide)
What is paper chromatography used for?
to separate coloured substances in ink or dyes
Why do we need molars?
To grind and crush food.
What is diffusion?
The movement of particles from high concentration to low concentration.
What is a molecule?
Two or more atoms chemically joined together.
What is the difference between an element and a compound?
An element contains one type of atom, while a compound contains two or more different elements chemically combined.
What is the difference between a concentrated solution and a dilute solution?
A concentrated solution contains more dissolved solute, while a dilute solution contains less dissolved solute.