2nd Grade Science : Physical Science
Study concepts, example questions & explanations for 2nd Grade Science
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Example Questions
Example Question #1 : Disassemble An Object Made Of Small Pieces Into A New Object
What does the term disassemble mean? Example: I need to disassemble the tower I made of blocks so I can make a rocket ship instead.
Take a photo of something
Kick with a strong force
Cook something delicious
Take something apart
Take something apart
The term disassemble means to take something apart. In this case, the child is taking apart a tower that has already been built to make something new. Objects can be disassembled, and their parts use for other projects.
Example Question #1 : Disassemble An Object Made Of Small Pieces Into A New Object
Which of these photos shows something made of smaller pieces that have been put together?
All of the answer choices are correct
All of the answer choices are correct
All of these photos show smaller pieces put together to make something new or larger. Bricks stacked to build a wall, blocks put together to create a tiger, and rings stacked into a cone are all pieces put together to make a whole.
Example Question #4 : Disassemble An Object Made Of Small Pieces Into A New Object
Tabitha's teacher gave her ten snapping cubes and told her to create at least five different shapes using only those cubes. She says this is an easy task, but her partner Mindy says there is no way it can be done! Who is correct, and why?
There is not enough information to make a decision.
Neither; both Mindy and Tabitha are wrong
Tabitha; the snap cubes can be pulled apart and made into different shapes to accomplish the task
Mindy: once the cubes are together Tabitha cannot take them apart to make more shapes
Tabitha; the snap cubes can be pulled apart and made into different shapes to accomplish the task
In this scenario, Tabitha is correct, and Mindy is wrong. Objects can be disassembled or broken apart to form new objects. In the case of the snap cubes, the pieces can be put back together to make a unique shape, or they can be formed into something new by changing their order.
Example Question #5 : Disassemble An Object Made Of Small Pieces Into A New Object
Which photo represents whole objects being broken down into smaller pieces to make something new?
The photo that represents an object being broken down into smaller pieces to make something new is the salad. The individual ingredients are added to make the entire salad. Olives, tomatoes, and peppers are cut up, etc. to be added onto the bowl of lettuce. This is an example of something new being created from the smaller pieces of objects being broken up.
Example Question #1 : Changes Caused By Heating And Cooling
Heating and cooling is a process that can be reversed. I melted a popsicle and then put the popsicle back in the freezer, and it froze into a solid popsicle again. I did this multiple times, and it always worked. This is an argument based on evidence.
True
False
True
This argument is based on evidence. There is no personal opinion or thoughts involved in the statement. The popsicle investigation provides data to make conclusions from, so it is evidence-based and supported.
Example Question #2 : Changes Caused By Heating And Cooling
Heating and cooling is a process that cannot be reversed. I had a candy bar in my pocket, and it melted. I was so angry that I had wasted it, so I threw it out. This is an argument based on evidence.
False
True
False
This argument is not based on evidence. There is personal opinion and personal thoughts involved in the statement. The candy bar incident was not scientific, there was no investigation or experiment in place, and the author put their ideas into the statement.
Example Question #3 : Changes Caused By Heating And Cooling
Heating and cooling is a process that can be reversed. There can be scientific investigations or experiments completed to make this statement based on evidence.
True
False
True
This statement is true, and it can be backed up by evidence. An investigation or experiment can be conducted to determine more information and data can be collected to strengthen the argument.
Example Question #1 : Changes Caused By Heating And Cooling
Which argument is constructed using evidence?
Some changes made to materials by heating or cooling them can be reversed. I think that my opinion is correct because I have thought about this for a long time.
Some changes made to materials by heating or cooling them can be reversed. If you melt an ice cube, you can refreeze it, and it will be a solid again.
Some changes made to materials by heating or cooling them can be reversed because there is nothing in the world that cannot be undone or redone.
Some changes made to materials by heating or cooling them can be reversed because once my science teacher told us that this was true.
Some changes made to materials by heating or cooling them can be reversed. I think that my opinion is correct because I have thought about this for a long time.
Three of the arguments listed include no evidence or personal opinion. The only statement that is based on scientific data or evidence is, "Some changes made to materials by heating or cooling them can be reversed. If you melt an ice cube, you can refreeze it, and it will be a solid again.". This statement mentions an example of an experiment that can be conducted, and evidence can be collected.
Example Question #5 : Changes Caused By Heating And Cooling
Which statement is constructed using evidence?
Heating and cooling is a process that can be reversed. I bought popsicles at the grocery store and put them in the freezer. This is an argument based on evidence.
Heating and cooling is a process that can be reversed. I bought popsicles at the grocery store, and they melted in the car. This is an argument based on evidence.
Heating and cooling is a process that can be reversed. I ate a popsicle. I did this multiple times. This is an argument based on evidence.
Heating and cooling is a process that can be reversed. I melted a popsicle and then put the popsicle back in the freezer, and it froze into a solid popsicle again. I did this multiple times, and it always worked. This is an argument based on evidence.
Heating and cooling is a process that can be reversed. I melted a popsicle and then put the popsicle back in the freezer, and it froze into a solid popsicle again. I did this multiple times, and it always worked. This is an argument based on evidence.
The statement that is constructed using evidence includes no personal opinions or statements and has scientific evidence to support the claim. "Heating and cooling is a process that can be reversed. I melted a popsicle and then put the popsicle back in the freezer, and it froze into a solid popsicle again. I did this multiple times, and it always worked. This is an argument based on evidence." This statement shows that the investigation was repeated multiple times, and information was recorded.
Example Question #1 : Changes Caused By Heating And Cooling
I melted a crayon and then put the crayon in the refrigerator, and it did not form back into the crayon shape, just a hard pile of colored wax. I did this multiple times, and it always happened the same way. I think heating can be reversed. This is an argument based on evidence.
False
True
True
This argument is based on evidence. There is no personal opinion or thoughts involved in the statement. The popsicle investigation provides data to make conclusions from, so it is evidence-based and supported.
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