Which best explains how periods on the periodic table are organized?

An ice cube is put into a heated pan. What will most likely happen to the molecules in the ice as the ice is heated?

Which pair of elements has the most similar properties?

If a chemical reaction such as photosynthesis begins with 6 atoms of Carbon (C), how many atoms of Carbon (C) should be in the products?

The table shows properties of several elements. Which element would Element X most likely be groups with on the periodic table?

Which shows one example of a physical change and one example of a chemical change?

How does a balanced chemical equation satisfy the Law of Conservation of Mass?

This chart describes an experiment using a sample of water and three solids made of different substances. Which property of water is being tested?

What characteristic of aluminum allows it to be made into aluminum foil?

Which pure substance is composed of more than one element?

After a chemical reaction occurs in an open test tube, measurements indicate that the mass of the reactants is greater than the mass of the products remaining in the test tube. What most likely explains the measurements?

Which factor best explains why some people will develop cancer and others will not after being exposed to the same high levels of a harmful chemical?

Which is the best way to determine if an object is made of pure silver?

Which is a naturally occurring chemical?

Which element is a poor conductor of heat?

This table shows the specific heat of four substances. If each substance is exposed to the same amount of energy for one minute, which substance will get the hottest?

A beaker with 100 mL of water is placed on a hot plate and heated. The water boils at 100°C. At what temperature would 90 mL of water boil?

Chemical X has a mass of 5 grams, and chemical Y has a mass of 10 grams. If the two chemicals are mixed and a complete chemical reaction takes place, what is most likely the mass of the product?

Which is an example of a physical change?

If a substance is composed of atoms arranged in one particular way, how is this substance best classified?

The data table above represents observations made by a scientist during an investigation. Use this table to answer the questions that follow.

A scientist preformed an investigation with samples listed in the data table above. She heated the 2 liquid samples until boiling. After a while, all of the liquid evaporated from Sample 1 and the container was empty. Later, all of the liquid evaporated from Sample 2 and a colorless powder remained.

1. Based on the information presented in the data table, which term best describes Sample 1?

A scientist preformed an investigation with samples listed in the data table above. She heated the 2 liquid samples until boiling. After a while, all of the liquid evaporated from Sample 1 and the container was empty. Later, all of the liquid evaporated from Sample 2 and a colorless powder remained.

Which term best describes Sample 2?

In the current model of the Periodic Table of Elements, the elements have been placed in groups or families. Why have the elements been organized in such a way?

A science teacher mixes calcium chloride and vinegar in a test tube. He passes the test tube around for his students to feel. The students notice that the test tube is hot. The science teacher asks the students to decide if the mixing of the two chemicals involved a physical or chemical change. He also asks the students to justify their answer.

Which student gave the correct response?

Sodium and chlorine can react chemically to form table salt. How does the mass of the table salt formed in this reaction compare to the mass of the sodium and chlorine before the reaction takes place?

A scientist performed an investigation using the above substances:

Based on the investigation and the packing of sample C, which measurement would most likely be the mass of the crystal?

A student placed 40 mL of water into a bottle, added one alka-seltzer tablet and quickly closed the bottle with a balloon.

The data table above shows observations made before the reaction:

Once the contents of the container completely reacted, the teacher measured the mass of the entire system. He shared his results with the class.

Which statement best describes the mass and explanation the teacher may have given?

Which is a concern related to the production of electricity using nuclear power?

The U.S.A. and other countries are often promoting the conservation of electricity and fossil fuels. Which is an advantage of these conservation efforts?

How are estuaries connected to oceanic organisms?

How would excessive increases in nitrate and phosphorous concentration affect freshwater systems?

If your community was planning to build a new sanitary landfill, what would be the most important environmental consideration in locating the landfill?

An index fossil is found in the same sedimentary layer as another fossil. What would this reveal about the other fossil?

Which is a major difference between an epidemic and a pandemic?

Strawberries have been genetically modified to resist frost. How is this a benefit for growers in North Carolina?

Which of the following limiting factors will most likely prevent further population growth within an ecosystem?

In a food web, energy flows from producer to consumers. What else flows from producers to consumers?

8.E.2.1 This diagram shows a cross section of land that has not been overturned and includes a fossil. What can be concluded about the age of the fossil?

8.E.2.2 An index fossil is found in the same sedimentary layer as another fossil. What would this reveal about the other fossil?

8.L.1.1 How are viruses, bacteria and parasites alike?

8.L.1.2 Which is a major difference between an epidemic and a pandemic?

8.L.3.1 Which of the following limiting factors will most likely prevent further population growth within an ecosystem?

8.L.2.1 Strawberries have been genetically modified to resist frost. How is this a benefit for growers in North Carolina?

8.L.3.2 A tick has caused a dog to be diagnosed with Lyme disease. What type of relationship would this suggest exists between the tick and the dog?

8.L.3.3 In a food web, energy flows from producer to consumers. What else flows from producers to consumers?

8.L.3.3 Today, in many parts of the world people suffer from not having enough food. One way that plant scientists could increase the amount of green plant food that is available for consumption by humans might be through the development of plants with larger leaves that would capture more solar energy to be converted into food. Which cycle of matter would most likely be affected by such an increase in leaf size?

8.L.4.1 The shaded areas of this diagram represent where fossils of a land- dwelling animal were found on the continents of South America and Africa. What does this evidence suggest?

8.L.4.1 Differences in bone arrangements shown below, supports the hypothesis that these organisms:

8.L.4.2 Darwin observed many birds that had many different beak shapes and sizes. There were few beaks that were similar because of…

8.L.5.1 When an animal eats food, the food and other nutrients must enter each cell in the animal’s body so the cells can carry out their functions. How do the food molecules and nutrients enter the cell?

How do the cells of the body respond when a person, over time, has a poor diet and little exercise?

Which one of the following oceanic zones would be home to bottom dwellers such as sea anemones and starfish?

Which is not an example of a valuable tool for studying geologic history?

Which best describes a negative effect of chewing tobacco?

Which best describes an estuary?

Which of the following may increase competition in an ecosystem?

How can someone determine if a chemical equation is balanced?

Which is an accurate description of a high level of turbidity?

Which of these organisms is a decomposer?

Which term best describes the process by which species of organisms change over time?

There is a flu outbreak every 20-40 years, why?

Which is older: Selective Breeding or Genetic Engineering

Which is not one of the key characteristics of Selective Breeding?

Which of the following is not part of the classification community?

Which symbiotic relationship is when one organism benefits and the other is not impacted (positively or negatively)?

Biomes have which of the following in common? (You can choose more than one)

An oak tree is a/an...

Which is not an element of biodiversity?

Breaks down and feeds on the remains of other organisms

Where does the food chain START?

Which of the following are factors that could cause extinction?