Chemistry
What is the chemical symbol for water?
H2O
What gas do plants produce during photosynthesis
Oxygen
What is the force that pulls objects toward the Earth?
Gravity
Which planet is known as the "Red Planet
Mars
What is the boiling point of water in Celsius?
100 degree Celsius.
Define the term "element" in chemistry.
Matter made up of one type of atom.
What are the main differences between plant and animal cells?
Plant cells have a cell wall and chloroplasts
Name the scientist who proposed the law of universal gravitation.
Newton
Explain the role of chlorophyll in photosynthesis.
It allows the plant to convert carbon dioxide to oxygen.
What are the three subatomic particles in an atom?
Proton, neutron and electron.
What is the pH scale used for?
Measure the acidity of a solution
How does natural selection contribute to evolution?
What is the difference between speed and velocity?
Velocity is a vector quantity and its measure includes direction of the force.
How do tectonic plates cause earthquakes?
When plates slide over each other, or they converge or submerge they will cause friction. The energy created is released in waves that cause the earthquake.
Explain the greenhouse effect.
The greenhouse effect is caused by greenhouse gases such as carbon dioxide forming an insulation layer in the atmosphere. The heat radiated off the earth is trapped beneath this layer.
How do enzymes speed up chemical reactions in the body?
An enzyme is a biological catalyst that speeds up a chemical reaction without changing the outcome of the reaction.
Explain how antibiotic resistance develops in bacteria.
Antibiotics kill bacteria. Those bacteria that have the resistance for the antibiotic survive. These bacteria reproduce asexually and all the offspring will contain the resistance to that antibiotic.
Calculate the density of an object with a mass of 10 kg and a volume of 2 m³.
Density = mass/volume
5kg/M3
Explain the impact of deforestation on the carbon cycle.
Deforestation reduces an ecosystems ability to convert carbon dioxide to oxygen, thus increasing the levels of CO2 in the atmosphere.
Predict the products of the reaction between hydrochloric acid and sodium hydroxide.
Salt (Sodium Chloride) and water.
Explain the quantum mechanical model of the atom.
Electrons exist in specific energy levels. They can move from level to level however they will always settle back to their ground state.
Describe how blood glucose levels are regulated in the human body.
Excess Glucose in the blood is converted to gylcogen by insulin and stored in the liver. When the glucose levels are low the glycogen is changed back to glucose by glucagon.
Calculate the final velocity of an object in free fall after 3 seconds (neglect air resistance).
V= g t
=10 *3
=30m/s
What type of igneous rock forms under the surface of the earth by the solidification of magma, and what are their typical crystal size.
Intrusive Igneous rock. Large crystal size due to slow formation.
Name the gland in the brain that is considered the controller gland for the human body.
The Pituitary gland