Chemistry
Biology
Physics
Earth and space
Pot Luck
100

What is the chemical symbol for water?

H2O

100

What gas do plants produce during photosynthesis

Oxygen

100

What is the force that pulls objects toward the Earth?

Gravity

100

Which planet is known as the "Red Planet

Mars

100

What is the boiling point of water in Celsius?

100 degree Celsius.

200

Define the term "element" in chemistry.

Matter made up of one type of atom.

200

What are the main differences between plant and animal cells?

Plant cells have a cell wall and chloroplasts

200

Name the scientist who proposed the law of universal gravitation.

Newton

200

Explain the role of chlorophyll in photosynthesis.

It allows the plant to convert carbon dioxide to oxygen.

200

What are the three subatomic particles in an atom?

Proton, neutron and electron.

300

What is the pH scale used for?

Measure the acidity of a solution

300

How does natural selection contribute to evolution?

Individual organisms that have characteristics that benefit their survival in a ecosystem will survive and reproduce. 
300

What is the difference between speed and velocity?

Velocity is a vector quantity and its measure includes direction of the force. 

300

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.

300

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. 

400

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.

400

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. 

400

Calculate the density of an object with a mass of 10 kg and a volume of 2 m³.

Density = mass/volume

5kg/M3

400

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.

400

Predict the products of the reaction between hydrochloric acid and sodium hydroxide.

Salt (Sodium Chloride) and water.

500

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. 

500

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. 

500

Calculate the final velocity of an object in free fall after 3 seconds (neglect air resistance).

V= g t

=10 *3 

=30m/s

500

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.

500

Name the gland in the brain that is considered the controller gland for the human body.

The Pituitary gland