Matter and atoms
what is matter?
Anything that has mass and takes up space.
A element is?
A pure substance consisting only of a certain type of atom.
Chemical bonds form by interactions of the atom’s…
Electrons.
Water is necessary for life. Water helps…
Regulate temperature
Allows for transport of nutrients and minerals
Is used as a habitat by many living things
When water molecules stick to other substances.
Adhesion.
Matter can be
Liquid, solid, and gas
Elements cannot be broken down.
True
Energy is stored in…
Chemical bonds.
What type of molecule is water?
A polar molecule.
Examples of cohesion.
Surface tension (skater bugs on water), drops on a penny
A atom is?
The smallest unit of matter that retains all the properties of an element.
What 4 elements make up over 96% of living things?
C (carbon), H (hydrogen), O (oxygen), N (nitrogen).
Living things obtain energy by…
Breaking apart chemical bonds.
What is held together by…
Polar covalent bonds.
Examples of adhesion.
Water moving up paper (paper chromatography), water stick to the sides of a graduated cylinder (meniscus).
Atoms are made of?
Subatomic particles - protons (+), neutrons (neutral), electrons (-).
What’s the difference between a compound and a molecule?
Molecules form when atoms join together by chemical bonds (O2, H2O). Compounds form when two DIFFERENT elements join together by a chemical bond (H2O).
More bonds
More energy!
What gives water it’s properties?
Hydrogen bonds between water molecules. Hydrogen bonds are very strong.
Solvent
A molecule able to dissolve other substances.
Atoms are bound together by…
Chemical bonds.
Chemical bonds form by interactions of the atom’s…
Electrons.
Put in order from least to most energy… polysaccharide, disaccharide, monosaccharide.
Monosaccharide
Disaccharide
Polysaccharide
When water molecules stick to each other.
Cohesion.
Difference between hydrophilic and hydrophobic.
Hydrophilic substances easily dissolve in water (sugar, salt). Hydrophobic substances do not dissolve in water (oil, fats).