1. Identify which of the following is a quantitative observation and which is a qualitative observation.

A student dips squares of nylon, polyester and cotton into water and then times them to see how long they dry. Based on the data table which are the best kind of socks to wear on a fishing trip are:

The positively charged part of the atom.

What is an example of diatomic molecule?

Based on the table below what factor is the independent variable?

Based on the table below what factor is the dependent variable?

Predict what the speed of sound will be at 75 degrees celsius.

Pseudoscience is an attitude of doubt.

Evan and his friends are working on a group project on matter. Michelle says that matter is anything that has mass. Ricky says matter must have mass and also be touchable. Evan thinks matter must have mass and also be visible. Leon disagrees and says that matter has both mass and takes up space. Who is correct?

What is pictured below?

Stevens' science project consists of six sealed and labeled containers. He challenges his classmates to identify pure substances versus mixtures. Identify each pure substance there will be more than one!

Jonah and Rachel volunteer at the recycling center sorting and organizing recyclable objects. Jonah is sorting aluminum cans and crushing the cans to fit more in the bag. Rachel is sorting metal and steel objects into appropriate bins. Jonah realizes that even though he is crushing the cans, the amount of material in each can is unchanged. Which of the following describes the process that is taking place?

Jonah and Rachel volunteer at the recycling center sorting and organizing recyclable objects. Jonah is sorting aluminum cans and crushing the cans to fit more in the bag. Rachel is sorting metal and steel objects into appropriate bins. 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?

Martina is camping and needs wood for a cooking fire as well as for shelter. She gathers a variety of logs and branches from the surrounding area. She chops and shapes some of the larger pieces of wood into uniform shapes to build her shelter. What kind of change is taking place as the wood is chopped?

When the physical property of an item changes that means the materials identity has also changed.

Which of the following changes demonstrates a chemical property?

The abilities to dissolve in water and to conduct electricity are examples of

When looking at the Modern Atomic model, the denser the cloud near the nucleus means... (Choose all that apply)

Min is conducting an experiment where he compares the properties of water and lemonade. The first stage of the experiment is focusing only on the physical properties of the water and lemonade. Which comparison point would Min not use in the first stage?

What is pictured?

Jonah and Rachel volunteer at the recycling center sorting and organizing recyclable objects. Jonah is sorting aluminum cans and crushing the cans to fit more in the bag. Rachel is sorting metal and steel objects into appropriate bins.

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?

The term Atom comes from the old Grecian term that means: