Chemistry
What is the second group of the periodic table?
Alkaline earth metals
Light travels in a _____ line.
Straight
What is the unit used for work?
Joules
Where does most of the digestion occur in the human body?
Small intestines.
The vertical columns of the Periodic Table are called __________.
Groups
What are the two kinds of waves?
Longitudinal and transverse waves
Whats the difference between potential and kinetic energy?
Potential energy is stored energy, kinetic energy is energy in motion.
What are the two types that respiration can be divided into?
Aerobic and Anaerobic.
What is the diferences between Exothermic and Endothermic reactions?
- An endothermic reaction receives energy from its surroundings.
- An exothermic reaction releases energy to its surroundings.
What is an example of transverse wave?
True or false: The Law Of Conservation Of Energy states that energy can be created or destroyed.
False. Energy cannot be created or destroyed.
True or false: The chemical process where energy is released from the food we eat is called respiration.
Hydrochloric acid + sodium carbonate -->________ + water + carbon dioxide
sodium chloride
What is the difference between mechanical waves and electromagnetic waves?
Mechanical waves require a medium. Electromagnetic waves do not.
What type of energy is created when a brick falls from the top of a wall?
Kinetic energy
Define ingestion
The intake of food for subsequent digestion.
Is lemon an acid or a base?
Lemon is an acid.
Where is the crest of a wave located?
The crest is the top part of the wave.
What is the formula for kinetic energy?
kinetic energy = ½ x mass x velocity^2
Define egestion
Egestion is the removal of feces from the gut.