Unit 1 Part 2 Review

Unit 1 Part 2 Review

Review of the concepts taught in the second 1/2 of Unit 1.

Chemical Equations

• Parts of a chemical equation

• Balanced vs unbalanced equations

• Law of conservation of mass energy

Chemical Equation Breakdown

• Reactants on the left

• Yield arrow in the middle

• Products on the right

• Subscripts and coefficients help us know how much of each element or compound is present.

• Matter cannot be destroyed nor created, but it can be rearranged.

Multiple Choice

The substances listed on the right side of a chemical equation are the

• Yields

• Products

• Reactants

• Precipitates

Multiple Choice

The substances listed on the left side of a chemical equation are the

• Yields

• Products

• Reactants

• Precipitates

Multiple Choice

In chemical reactions, what does the law of conservation of mass mean?

• Matter is not created nor destroyed.

• The total mass of the reactants is less than the total mass of the products.

• The total mass of the reactants is greater than the total mass of the products.

• Matter is not changed.

Chemical Reactions

• Types of chemical equations

• Differentiating between the types

Easy Chemical Reactions Guide

• Look at what is in the reactants (elements or compounds)

• Then look at the products (did something switch places or did it make a different compound)

Multiple Choice

An element plus additional element reacts to form one product is an example of which type of chemical reaction?

• combustion

• synthesis

• decomposition

• single replacement

Multiple Choice

Which type of reaction takes place in the presence of oxygen and produces carbon dioxide and water?

• double replacement

• combustion

• decomposition

• single replacement

Carbon and Nitrogen Cycles

• Processes

• Compounds Involved

• Reservoirs

Carbon Cycle

• Reservoirs in black

• Processes in orange

• CO2 (atmosphere, hydrosphere), Glucose and organic carbon forms (biosphere and hydrosphere), Geosphere (fossil fuels)

Multiple Choice

When humans burn fossil fuels, most of the carbon quickly enters the as carbon dioxide.

• water

• sun

• atmosphere

• plants

Multiple Select

How do living organisms return carbon to the atmosphere in the carbon cycle?

• respiration

• photosynthesis

• decomposition

Nitrogen Cycle

• Reservoirs: Atmosphere, biosphere

• Processes in orange

• Who does it in green

• Compounds in blue

Multiple Choice

What converts nitrogen gas into a usable form for plants and animals?

• bacteria

• fungi

• rain

• car exhaust

Multiple Choice

What is the process of combining nitrogen gas with other elements to make nitrogen into usable compounds?

• nitrogen composition

• ammonia

• nitrogen fixation

• denitrification

Nucleosynthesis

• How atoms and elements were formed

• 3 types of nucleosynthesis

• Life cycle of stars

Nucleosynthesis Types

• Big Bang (less than 10 minutes 13.7 billion years ago): Initial hydrogen and some helium

• Stellar nucleosynthesis (core of a star): helium - iron

• Supernova nucleosynthesis (when a high mass star dies): elements heavier than iron

Multiple Choice

Helium is generated in the stage of a star's life?

• Main Sequence

• Red Giant

• Red Supergiant

Multiple Choice

Elements heavier than iron, like gold and silver, are generated in this type of nucleosynthesis?

• Big Bang

• Stellar

• Supernova