Testing hypotheses often involves designing experiments. Which of the following is the factor that is observed and measured in an experiment? What factor was observed and measured in the apple experiment you designed?

After her morning workout, Neveah felt thirsty. Seth her friend explains to her that thirst was her body’s way of telling her she needed more water to maintain _____.

Naszaiah is talking about evolution with a friend. The friend says, “It’s just a theory, so I don’t believe it. When they prove it and it becomes the law of evolution, then maybe I’ll change my mind.” Which of these possible replies best describes scientific principles or the work of scientists?

Chloe notices that the leaves of her fern plant are drooping this morning. The leaves were not droopy yesterday. She decides the plant needs to be watered. What had Chloe just done?

Justin and Michael are trying to explain what “science” is to a 3rd grade YPA student to help them with their homework. The following are statements they have both looked over on the 3rd graders homework sheet. Which of the following statements about science is most accurate?

Dr. Buss and her team have observed an unusual star in the Andromeda galaxy. Their data suggests that the star is being consumed by a nearby black hole. They write a scientific paper about their work and submit it to a scientific journal. Other scientists read their paper and look for the unusual star as well. The other scientists are participating in which of these activities?

Seth’s grandmother is taking part in an experiment to determine how well a new headache medication works. In this experiment, the people in Group A are taking the new medication. The people in Group B, including Seth’s grandmother, are taking a pill that does not contain the new medication. In this experiment, what is Group B?

While watching a documentary Alex & Ayden listen as the narrator talks about how humans began using technology to improve their lives. The narrator states that, science began out of humankind’s natural curiosity to understand and explain the interactions and processes of the natural world. Science aims to use these explanations to understand patterns in nature, as well as to address issues that face the natural world and human society. Which statement BEST reflects the efforts of scientists in pursuing the goals of science?

Biologists have certain criteria that must be met if something is to be considered living. All living things are made up of cells and have ___________, which carries the genetic code.

Living things __________, either sexually or asexually.

The chemical reactions of __________ help an organism use materials and energy to stay alive.

Living things respond to ___________, signals that come from within or from the environment.

Most organisms maintain a stable internal environment and the process by which they do this is ___________.

Living things can also change over time, or ___________.

Although they must be skeptics, they should be willing to change their minds ideas when the ___________ demands it.

1 meter equals

1 kilogram equals

1 gram equals

The freezing point of water is

The iguana in the picture is most likely a related to other iguanas on neighboring islands, but not directly the same species. This is an example of evolution. Which is best defined as a _______________.

An identical genetic copy

The elements sodium and chlorine react to form the chemical compound sodium chloride. How would you predict the properties of sodium chloride compare with those of its constituent elements?

Which two types of particles are present in equal numbers in an atom, but not in an ion?

The diagram shows water at the molecular level. What property of a water molecule allows hydrogen bonds to form among adjacent molecules?

Emma has been assigned household weak acids for her chemistry project. Household bleach has a pH between 12 and 13. Should Emma add bleach to her list of solutions? From this information, which of the following BEST describes the bleach solution?

Human blood has a pH of 7.4. How do buffers in the blood affect the pH?

The diagram shows the structure of a water molecule. What allows the three atoms in a water molecule to stay together?

What event changes an atom into an ion?

Dr. Sartain is studying two isotopes of sodium, labeled A and B. In Isotope A, each of the atoms has 11 protons, 12 neutrons, and 11 electrons. What could be the atomic structure of Isotope B?

Sophia and Zachary have been asked to evaluate the following model of an atom created by another student. In their feedback to the student which change to the model of the carbon atom would improve its accuracy?

Kelvin notices water droplets on his window and in the grass. The street he lives on is wet when he walks out of his front door to head to school. Kelvin asks his mom if it rained last night. When scientists ask questions using inferences this may lead to the formation of a(n) ________.

Scientists conduct _________ which include a control group to serve as a basis for comparison.

Katelyn is testing the hypothesis that plants rely on photosynthesis to grow. She conducts an experiment in which she observes the sprouting and growth of bean seeds. The beans are raised either in sunlight or darkness. She records her observations in a data table.

Which statements from Katelyn's records convey quantitative data, and not qualitative data? Choose all that apply.

if a researcher is open- minded they

Make that conversion! centi-

the metric system is used as a way to keep scientific measurements uniform across the world

Make that conversion! 1 Liter

Make that conversion! 1000 milligrams

All matter is made of what

The central region of an atom where its neutrons and protons are is its___________and has a ______________ charge.

Kailyn and Spencer are working on their homework and come across a problem asking them to categorize a list as either elements, compounds, or molecules and justify their answer. They place water in a category. They decide to justify their response by stating a pure substance that consists entirely of one type of atom is a(n) _____________, but water consists of more than one substance bound by covalent bonds therefore it must be a _________________.

A molecule in which the charges are unevenly distributed is said to be

Any compound that releases hydrogen ions into solution

Weak acids or bases that can react with strong acids or bases to prevent, sharp, sudden changes in pH