Synthetics
Luisa likes to drink water from a plastic bottle. She knows the bottles were formed from synthetic polymers that were created in a chemical reaction. She also knows that synthetic materials can cause problems. Which statement explains the kind of problem that can develop from using synthetic materials such as plastic?
A. Plastics have changed the way people use materials.
B. Plastics have made the lives of people easier.
C. Plastics have contributed to more pollution
D. Plastics have made more work for people
C. Plastics have contributed to more pollution
Ella is interested in combining substances to form a new material.
What does Ella need to know before she combines the substances to create a specific material?
A. whether the substances are synthetic or from natural resources
B. that all materials react to combine and form new products accidentally
C. the physical and chemical properties of the material that will be formed
D. the physical and chemical properties of the substances and how they react chemically
D. the physical and chemical properties of the substances and how they react chemically
Later that day, Will made toast and buttered it, but then he left the butter out on the warm stove. What kind of change would most likely take place with the butter?
A. chemical
B. physical
C. liquid
D. solid
B. physical
Ian has been learning about different kinds of mixtures at school. While he was helping prepare dinner for his family, he noticed that some of the food they were making were different kinds of mixtures. What kind of mixture was their dinner if they were having spaghetti and meatballs?
A. heterogenous
B. Suspension
C. Homogenous
D. Solute
A. heterogenous
From base to point, what is the order of the colors on a piece of candy corn?
Yellow, orange, and white.
Calvin was using super glue one afternoon after learning about synthetic materials. He understood that chemists create different kinds of new products based on their knowledge of the properties of substances and how they react with each other. What kind of product is super glue?
A. accidental
B. developed
C. exothermic
D. planned
A. Accidental
One day on her walk home from school, Leann noticed some rust on an old car. She remembered that chemical equations can summarize what happens in a chemical reaction. What is the name of the two parts found on the left side of the equation below?
A. products
B. reactants
C. scientific notation
D. synthesis
B. reactants
Macy has been studying physical and chemical reactions in school. She read about chemical reactions and how energy is either required or released during chemical reactions. Which word describes the direction of heat flowing away from a lantern and into it's surrounding environment?
A. chemical
B. endothermic
C. exothermic
D. physical
C. exothermic
After reading about the kinds of mixtures and their characteristics, Jasmine wants to know how a heterogeneous mixture is different from a homogeneous mixture. What is the main difference between these two kinds of mixtures?
A. In a heterogeneous mixture, the components are not evenly spread throughout the mixture. In a homogeneous mixture, the components are evenly spread throughout the mixture.
B. In a homogeneous mixture, the components are not evenly spread throughout the mixture. In a heterogeneous mixture, the components are evenly spread throughout the mixture.
C. In a homogeneous mixture, the components are easy to see and are well mixed so the components show up in different parts of the mixture.
D. In a heterogeneous mixture, the components are difficult to see and are spread out uniformly throughout the mixture
A. In a heterogeneous mixture, the components are not evenly spread throughout the mixture. In a homogeneous mixture, the components are evenly spread throughout the mixture.
In which country can you find sugar skulls during the Halloween season?
Mexico
Desmond wanted to paint his bedroom. He went to the hardware store and was shown a variety of different paint colors from which to pick. Paint is an example of which kind of product that is made with chemicals by humans?
A. Natural
B. Synthetic
C. Accidental
D. Natural Resource
B. Synthetic
After having studied chemical reactions in school, Jose knew that when oxygen and hydrogen gases combine in the correct amounts, the combination yields a new substance, water. The hydrogen and oxygen are (products/reactants/synthetics/polymers) while the water is the (product/reactant/synthetic/polymer).
The hydrogen and oxygen are REACTANTS while the water is the PRODUCT
Rachel notices that many objects have rusted. Rusting is a chemical change that some metal and steel objects undergo when they are exposed to oxygen. Which option best describes a chemical change?
A. a change from solar energy to chemical energy
B. a change in matter that produces one or more new substances
C. a change from a liquid state to a gas state
D. a change in form or appearance of matter
B. a change in matter that produces one or more new substances
Which of the following statements is true?
A. a solution is a pure substance
B. a solution is a mixture
C. the solvent is dissolved in the solute
D. a solution has the same properties as a colloid
B. a solution is a mixture
What do you call a group of witches?
A coven
Kylee has been learning that engineering and technology are beneficial to people. She now sees how the things people synthesize are useful. The useful materials that benefit people are synthesized from _____________________
Natural Resources
After learning about the law of conservation of mass, Remy began to wonder about how to best test this law. She wanted to show that the amounts of matter did not change but produced an equal amount of a different kind of matter. What is the best way to study this law?
A. in a homogeneous mixture
B. in a heterogeneous mixture
C. in an open systemin an open system
D. in a closed system
D. in a closed system
Alex saw a rusty old car in an abandoned lot. Because he had recently read about chemical reactions, he began to wonder how the rust formed. What happened to cause the rust on the steel car?
A. A physical change took place in the steel of the car to form rust.
B. Oxygen in the air reacted with the paint on the car and formed rust
C. Oxygen in the air chemically combined with the iron in the steel to form rust
D. A decomposition chemical reaction took place when the iron in the steel mixed with oxygen to form rust
C. Oxygen in the air chemically combined with the iron in the steel to form rust
Keesha performed a chemical reaction, and the products looked quite different from the reactants. She knew the amount of matter had not changed due to the law of conservation of mass. According to the law of conservation of mass, what happens in a chemical reaction?
A. Matter is not created or destroyed and the same amount of mass remains.
B. A new kind of matter is created and the amount of mass either increases or decreases.
C. Matter is not created or destroyed and the amount of mass may change after the reaction.
D. New matter is created and changes form so that the mass of the reactants and the products will almost be equal.
A. Matter is not created or destroyed and the same amount of mass remains.
What country did carving jack-o’ lanterns originate?
Ireland
Which of the following statements about synthetic materials is true?
A. Synthetic materials are never harmful to the environment.
B. Synthetic materials are pure substances found in nature.
C. Synthetic materials have properties that are different from those of the natural materials used to produce them.
D. Synthetic materials are not different from natural materials.
C. Synthetic materials have properties that are different from those of the natural materials used to produce them.
Leandra is learning about chemical reactions and she wants to examine the information that is included in a chemical equation. Which pieces of information does a chemical equation include? Choose the all that apply
A. the kinds of atoms that form during a reaction
B. the kinds of molecules involved in the reaction
C. the kinds of elements that make up a molecule
D. whether the molecules are products or reactants
E. whether the products have more mass than the reactants
B. the kinds of molecules involved in the reaction
C. the kinds of elements that make up a molecule
D. whether the molecules are products or reactants
In general, what happens to the rate of reaction when you decrease the temperature of a chemical reaction?
A. It increases
B. It decreases
C. It remains unchanged
D. It increases, then decreases
B. It decreases
After reading that a solution is a homogeneous mixture, Jasmine wondered about her favorite morning drink, grape juice. Which statement about the solution that makes up grape juice is true?
A. Sugar is the solvent, and water is one of the solutes.
B. Water is the solvent, and sugar is one of the solutes.
C. Grapes are the solvent, and water is one of the solutes.
D. Sugar is one of the solvents, and grapes are one of the solutes.
B. Water is the solvent, and sugar is one of the solutes.
What is the name of the Romanian region where Dracula’s castle is located?
Transylvania