Matter: Properties & Change
Which is a compound?
A sodium
B sugar
C nitrogen
B Sugar
Which disease is caused by a fungal infection?
A intestinal worms
B influenza
C athlete’s foot
C athlete's foot
Which statement provides the best evidence that upwelling supplies nutrients to shallow ocean ecosystems?
A There is less dissolved oxygen in zones of upwelling.
B There are more animals living in zones of upwelling.
C The temperature is lower in zones of upwelling
B There are more animals living zones of upwelling.
Which change increases the biodiversity of an area the most?
A rapid decrease in precipitation
B gradual increase in food resources
C extinction of an existing species
B gradual increase in food resources
How clear the water is called
Turbidity
This is a chemical reaction for the decomposition of carbonic acid into water and carbon dioxide.
H2O3 → H2O + CO2
How does the reaction support the Law of Conservation of Mass?
A Several molecules of water are produced.
B The mass of carbon atoms is reduced during the reaction.
C The mass of the atoms in the reactant equals the mass of the atoms in the products.
C The mass of the atoms in the reactant equals the mass of the atoms in the products
How has genetic engineering helped farming?
A by developing better fertilizer for crops
B by creating crops that resist some diseases
C by producing soil that makes crops grow better
B by creating crop that resist some diseases
What is the amount of salt water on Earth?
A 96%
B 68%
C 2.5%
A 96%
Food is measured in calories. The number of calories a body needs changes based on many factors. An adolescent body uses energy differently than an adult body.
Which difference would cause an adolescent body to require more calories than an adult body?
A Adolescents sleep more.
B Adolescents are still growing.
C Adolescents eat more.
B Adolescents are still growing.
How easily a substance can catch fire is called
Flammability
Which is classified as an element?
A carbon dioxide
B iron
C vinegar
B. Iron
How can biotechnology help farmers overcome sudden changes in the global climate?
A by changing the types of soil in which the crops are planted
B by developing crops that are resistant to adverse weather
C by rotating the crops within the same field
B by developing crop that are resistant to adverse weather
Pamlico and Albemarle Sounds are two large estuaries along the coast of North Carolina. The sounds have large populations of diverse plant life.
Why are there many plants living in North Carolina’s estuaries?
A River water brings sediments from inland that bury aquatic plants in North Carolina’s estuaries.
B Most of North Carolina’s estuaries are shallow, and sunlight can reach the plants on the estuary floor.
C North Carolina’s estuaries act as protected environments for species that eat plants as a food source.
B Most of North Carolina's estuaries are shallow, and sunlight can reach the plants on the estuary floor.
An atom of the element strontium has 38 protons, 38 electrons, and 50 neutrons. What is the atomic mass of strontium?
A 50; the atomic mass is the number of neutrons.
B 76; the atomic mass is the number of protons and electrons.
C 88; the atomic mass is the number of protons and neutrons
2 or more elements chemically combined is called
Compound
Which is the best example of a chemical change?
A butter melting
B egg cooking
C paper tearing
B egg cooking
Scientists have been able to cause some bacteria to produce insulin. In which area of science would these scientists most likely work?
A biotechnology
B nuclear engineering
C marine biology
A biotechnology
A clear stream in a forest has very slow-moving water. Leaves from the trees cover the bottom of the stream. The water cannot support fish and aquatic insects and is evaluated to be low quality.
Which statement explains why the water quality is low?
A Slow-moving water causes the water temperature to be similar to the air temperature.
B Low levels of nitrates and phosphates cause the water to be clear.
C The decomposing leaves in the bottom of the stream reduce the dissolved oxygen.
C The decomposing leaves in the bottom of the stream reduce the dissolved
Scientists have developed genetically modified (GMO) plants. These GMO plants have an added gene that produces certain proteins that act as toxins to insects. The modified plants reduce the need for pesticides.
Which likely is an ethical concern about GMO plants?
A These plants may disrupt the food chain.
B These plants may have an increased nutritional value.
C These plants may decrease the amount of water needed for growth.
A These plants may disrupt the food chain.
Oldest layers at the bottom is called
Law of Superposition
Which group’s elements are found naturally in a gaseous state?
A 1
B 13
C 18
C 18
Which illness could most likely be treated with antibiotics?
A influenza
B common cold
C strep throat
C Strep throat
Which feature of a rock outcrop likely indicates that the area was near a plate boundary in the past?
A Faults
B Sedimentary rocks
C Fossils
A Faults
Cars moving or sitting still in traffic on major highways increase air pollution. To reduce air pollution and traffic, many states have high-occupancy vehicle lanes reserved for vehicles carrying multiple people. These lanes have fewer stopped cars compared to other highway lanes.
Which other idea will reduce air pollution the most?
A Increase the use of public transportation rather than multiple smaller vehicles.
B Reduce the number of vehicles allowed to use high-occupancy vehicle lanes on highways.
C Start a public education event to teach drivers how car exhaust is made from burning gasoline.
A Increase the use of public transportation rather than multiple smaller vehicles.
An organism killed and eaten by another organism is called
Prey