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7th Grade Spring Final Review 2018
Terms in this set (40)
What occurs when enzymes break down foods into simpler substances?
Does using your mouth to chew food cause physical or chemical changes to the food you eat?
Physical changes; because of chewing, food's appearance changes but not its chemical makeup.
Which of the following describes a function of the digestive system?
To break down food
In which direction do arteries carry blood?
Away from the heart
Why is it important for your blood to complete both loops of circulation?
One loop takes oxygen into my blood and the other loop delivers oxygen to my cells.
What happens in the lungs?
Tiny, thin-walled sacs of lung tissue called alveoli allow gases to move between the air and blood, The alveoli transport the waste products of cellular respiration, Blood picks up oxygen and glucose from the alveoli and delivers them to body cells
How does removing wastes from the body help maintain homeostasis?
By protecting the body from the buildup of harmful chemicals
A traveler on a bus does not drink water for several hours. How will her urine volume compare
to the volume she produces on a day when she drinks water every two hours?
Much lower urine volume
Which is an example of how different systems of the body move and manage materials?
The respiratory system moves air into and out of the body. The excretory system removes wastes.
What role does the liver play in digestion?
It produces bile to physically break fat into smaller droplets.
Which is a main function of the nervous system?
Maintaining homeostasis, Responding to information, Receiving information from inside and outside the body
Why is it important for the brain to be well protected?
The brain is the body's control center and if injured, the body's functions could be affected.
If a head cold interferes with your sense of smell, how might your sense of taste be affected?
I would not be able to taste as many flavors.
How does adrenaline affect the heart?
It speeds up the heart rate.
Which body systems regulate and control body processes?
The endocrine system and the nervous system
What is fertilization?
It is the joining of a sperm cell and an egg cell.
Before birth, a human grows from
a zygote to an embryo, and then to a fetus.
Which structure contains blood vessels from both the embryo or fetus and the mother?
Which is the best definition for infectious disease?
Any disease caused by a pathogen
Which is the body's first line of defense against pathogens?
The surface of the skin, The breathing passages, The mouth and stomach
What determines an organism's energy role?
How it obtains food and how it interacts with other organisms
A food ______ is a series of events in which one organism eats another and obtains energy. A
food ______ consists of many overlapping food ______.
chain, web, chains
When you use an energy pyramid to diagram energy flow, why are there usually fewer
organisms at the top?
Since so much energy is lost going from one level to the next level up, the energy available at the top level can support only a few organisms.
Which are the processes of the water cycle?
Evaporation, condensation, and precipitation
In an ecosystem, carbon and oxygen are both
Why is nitrogen gas called "free" nitrogen?
Because it is not combined with other kinds of atoms
An environment supports a population by providing all the necessary conditions for survival
food, water, and space
Which are the two main factors that determine an area's biome?
Precipitation and temperature
What are the two major types of aquatic ecosystems?
Freshwater and marine
Which phrase names the series of predictable changes that occur where no soil or organisms
How does area usually affect biodiversity within an ecosystem?
A larger area will usually contain more species than a smaller area.
What is an adaptation?
A trait that increases an organism's ability to survive and reproduce
What is a variation?
Any difference between individuals of the same species
Which term describes the process by which individuals that are better adapted to their
environment are more likely to survive and reproduce?
Dichotomous keys are used to
determine the identity of organisms.
How are instincts and learned behaviors different?
Instincts are inborn, but learned behaviors result from experience.
The regular, seasonal journey of an animal from one place to another and back again is called
How can an animal's behavior help it survive and reproduce?
Hibernation aids survival by allowing animals
to sleep through the coldest part of winter,
Migration moves animals to an area that provides a lot of food or a good environment for reproduction, and
Circadian rhythms enable certain animals to be active at night so that they do not encounter predators
who are active during the day.
Which type of adaptation helps organisms survive in their environments?
Structural, Behavioral, and Physiological
Animals communicate by using
scents, sounds, and body movements
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