CHEMISTRY
What happens to atomic numbers as you go to the right on the periodic table
a. They increase
b. They decrease
c. They stay the same
d. They are divided
a. They increase
Organisms well suited to their environment
a. usually live longer than organisms less suited to that environment and therefore have a greater chance to reproduce.
b. are usually larger than organisms less suited to that environment.
c. always reproduce at a greater rate than those less suited to the same environment.
d. need less food than organisms less suited to that environment.
a. usually live longer than organisms less suited to that environment and therefore have a greater chance to reproduce.
What is one advantage of asexual reproduction?
a. There is no need to find a mate
b. There is more genetic diversity in the offspring
c. They create more than 3 offspring at once
d. Only bacteria and single celled organisms can reproduce this way
a. There is no need to find a mate
Which is the correct formula for density?
a. Volume times mass
b. Mass times weight
c. Volume divided by mass
d. Mass divided by volume
d. Mass divided by volume
Which of the following describes chemical reactions?
a. Two or more different atoms combine to form a solution
b. Two or more different atoms rearrange to form new bonds in new substances
c. Two or more different atoms combine to form a mixture
d. Two or more different mixtures share neutrons to form a chemical bond
b. Two or more different atoms rearrange to form new bonds in new substances
If an atom has 14 protons and 13 neutrons, how many electrons will it have?
a. 4
b. 13
c. 14
d. 7
c. 14
According to the theory of evolution, giraffe populations have long necks because
a. they stretched their necks to reach higher leaves
b. the longer necked giraffes were at an advantage to survive, reproduce, and pass on their long neck genes because they could reach the leaves
c. the giraffes used neck stretchers from the pharmacy to stretch their necks
b. the longer necked giraffes were at an advantage to survive, reproduce, and pass on their long neck genes because they could reach the leaves
Which of the descriptions below applies to sexual reproduction?
a. The offspring are genetically identical to the parents
b. It only requires one parent
c. The new offspring are formed as a result of two specialized cells combining
d. The offspring are clones of two parents
c. The new offspring are formed as a result of two specialized cells combining
If the mass of a cube were 48 g, and its volume 24 cm3, what would its density be?
a. 2 g/mL
b. 2 g/ cm3
c. 4 g/cm3
d. 6 g/cm3
b. 2 g/ cm3
The equation below is considered balanced because
2H2 + O2 --> 2H2O
a There are more hydrogen atoms on the left than on the right
b. There are the same number of atoms in the reactants as there are in the products
c. There are more oxygen atoms on the right than on the left
b. There are the same number of atoms in the reactants as there are in the products
What are the charges on the particles that are found in atoms?
a. Protons are positive, neutrons and negative, and electrons are neutral
b. Protons are negative, neutrons are neutral, and electrons are negative
c. Protons are positive, neutrons are neutral, and electrons are negative
d. Protons are negative, neutrons are neutral, and electrons are positive.
c. Protons are positive, neutrons are neutral, and electrons are negative
One thing you would NOT have found in ancient Earth’s atmosphere was ____________________.
a. Oxygen
b. Clouds
c. Heat
d. Methane
a. Oxygen
Where are your genes located?
a. in your DNA
b. on your chromosomes, which are made of DNA
c. only in egg and sperm
b. on your chromosomes, which are made of DNA
Why is deforestation such a problem?
a. Removal of the forest decreases the amount of carbon dioxide in our atmosphere
b. It decreases the amount of water in the soil
c. It increases levels of carbon dioxide in the atmosphere, contributing to climate change
d. It gives more animals a new habitat.
c. It increases levels of carbon dioxide in the atmosphere, contributing to climate change
Valence electrons are the high energy electrons. Which electrons are valence electrons?
a. The ones in the innermost orbital
b. The ones in the middle orbital
c. The ones in the outermost orbital
d. None because they all have equal energy
c. The ones in the outermost orbital
Frozen water is not like most solids. Why not?
a. The particles are arranged in ice and spread out more than liquid water
b. The atoms of hydrogen and oxygen separate
c. The particles of liquid water have a lot less kinetic energy
a. The particles are arranged in ice and spread out more than liquid water
Earth is estimated to be _______________________________years old.
a. 4.5 million
b. 4500
c. 4.5 billion
d. 45,000
c. 4.5 billion
Which of the following is a false statement?
a. Animals like polar bears can change their fur color to help them survive in a new environment
b. Darwin came up with the idea of evolution by natural selection
c. Giraffe’s can’t change their neck length if the leaves are higher. Their neck length is coded for by their DNA.
d. Darwin travelled to the Galapagos Islands where he made deductions about the finch species that lived there.
a. Animals like polar bears can change their fur color to help them survive in a new environment
Which of the following statements about the water cycle is true?
a. The sun and gravity are the driving forces of the water cycle
b. Water produced from burning fossil fuels is a prime reason for climate change
c. The majority of the water on the planet is freshwater
d. The cooling of water vapor into liquid is called evaporation
a. The sun and gravity are the driving forces of the water cycle
What is the relationship between the number of protons and the number of electrons in a neutral atom?
a. There are as many protons as there are electrons
b. There are double the number of protons as there are electrons
c. There are 10 more electrons than there are protons
a. There are as many protons as there are electrons
What types of evidence are there that a chemical reaction has occurred and new substances are formed? LIST ALL THAT APPLY
a. An apple being cut into pieces
b. A balloon expanding when heated
c. An cut apple browning
d. A log burning
c. An cut apple browningd.
d. A log burning
Plants have different kinds of leaves. Some plants have small, narrow, wax coated leaves and some have big, round leaves with no waxy coating. Plants with the small leaves retain water better due to leaf size and their waxy coating. Plants with large leaves lose more water due to evaporation because of the larger leaf surface and the lack of the protective, waxy coating. Competition is fierce for water with the many plants that grow and not all will survive. When a drought hits, plants with large leaves lacking a waxing coating will perish first, and the small leaved plants with wax will survive.
What plant will natural selection select
AGAINST? ___________________
FOR? _________________
AGAINST? ___LARGE NON WAXY LEAVED PLANTS__
FOR? ______SMALL, WAXY LEAVED PLANTS_______
Which organism below reproducs asexually?
a. tigers
b. spiders
c. bacteria
d. fish
c. bacteria
Which would you use to determine the mass of an object?
a. Meter stick
b. Graduated cylinder
c. Timer
d. Balance
d. Balance
What is the difference between covalent and ionic bonding?
a. There is no difference. They are the same
b. Covalent bonding involves electrons, and ionic bonding doesn’t
c. Covalent bonding is a sharing of electrons, and ionic is a transfer
d. Covalent bonding involves a different size of atom
c. Covalent bonding is a sharing of electrons, and ionic is a transfer
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