Water
Describe the polarity of water
Contains a positive and negative side
______________ are the basic building blocks of matter.
Atoms
What is it called when one substance breaks up another into smaller pieces?
dissolving
True or false: Carbon can form four bonds.
true
Eating food provides _____________ energy.
chemical
What is cohesion?
Water molecules stick to themselves
The nucleus of an atom usually contains_______ and ______.
Protons and neutrons
________________ speed up chemical reactions by allowing them to have a lower activation energy.
enzymes or catalysts
Which type of organic compound makes up crab shells and insect exoskeletons?
carbohydrate
_____________ energy is caused by the speed of particles in random motion. (example hot coffee has more than cold coffee)
Thermal
What property of water makes it a good solvent?
polarity
A substance made of only one kind of element or compound is a_______________________.
Pure Substance
The substance that dissolves another substance is called the____________
solvent
Nucleotides make up _____________ molecules.
DNA
The _____ law ___ _______________says that the amount of matter and energy in the universe does not change.
lst law of Thermodynamics
What is the attraction of water molecules to other surfaces?
Adhesion
A negatively charged ion is a_____________ while a positively charged ion is a _____________.
anion, cation
______________ reactions absorb energy.
Endothermic
____________ fats contain double or triple bonds while _______________ fats contain only single bonds
Unsaturated, saturated
What’s the difference between a chemical and physical change?
Chemical: new substance present
Water compounds bond to each other via ________ bonds.
hydrogen
What are the electrons called in the outer-most shell of an atom?
valence electrons
What causes Brownian motion?
Movement of molecules hitting larger objects
What makes one amino acid different from another?
The R group
What is the smallest part of an ionic compound?
formula unit