Magnetic Solution Criteria - 3rd Grade Science

Which term means "a limit such as time, materials, or safety" in a magnetic design?

Constraint. Constraints are restrictions like available resources or rules.
What is a size constraint in a magnetic solution design?

A limit on how big or small the solution can be. Size restrictions limit design possibilities.
Identify the constraint in this statement: "You may only use materials in the classroom."

Only classroom materials may be used. This limits available resources for building.
What is a time constraint in a classroom magnetic design challenge?

Finish building and testing within the set time. Time limits restrict how long you can work.
Identify whether this statement is a criterion or constraint: "It must sort metal from plastic."

Criterion. This measures success (sorting ability), not a limit.
Identify whether this statement is a criterion or constraint: "It must lift $10$ paper clips."

Criterion. This measures success (lifting ability), not a limit.
What is a common performance criterion for a magnetic solution that sorts materials?

Correctly separates magnetic from nonmagnetic items. Performance criteria measure how well it works.
What is a performance criterion for a magnetic solution that collects metal items?

It must collect the required number of metal items. Performance criteria measure success.
What is a reliability criterion for a magnetic solution?

It must work the same way each time it is used. Reliability ensures consistent performance.
Choose the statement that is a constraint, not a criterion: A) "Finish in 15 minutes" B) "Pick up paper clips"

A) Finish in 15 minutes. Time limits restrict how long you can work.
What is one safety constraint that can apply to a magnetic solution?

It must not include hazards such as sharp parts. Safety constraints prevent harm to users.
What is a materials constraint for building a magnetic tool in class?

Use only the allowed materials provided. This limits what resources can be used.
Identify whether this statement is a criterion or constraint: "You may not use glue or tape."

Constraint. This restricts which materials can be used.
What is a size constraint that might apply to a magnetic solution?

It must fit within a required size or space. Size limits restrict physical dimensions.
Which option best matches a criterion: "must pick up 10 paper clips" or "only 1 magnet allowed"?

Must pick up 10 paper clips. This states a goal to achieve, not a limitation.
Identify whether this is a criterion or constraint: "The device must use only 1 bar magnet."

Constraint. This limits the number of magnets allowed.
Which option is a criterion: "must stay under 10 minutes" or "must pick up paper clips quickly"?

Must pick up paper clips quickly. Speed of collection is a performance goal.
What is the difference between criteria and constraints in one sentence?

Criteria judge success; constraints limit what you can do. Criteria are goals to achieve; constraints are rules to follow.
What is the difference between criteria and constraints in a magnetic solution?

Criteria are goals; constraints are limits. Goals describe what to achieve; limits restrict how.
What is a criterion in an engineering design problem about magnets?

A requirement the solution must meet to be successful. Criteria define what makes a solution successful.
Which word best describes a limit like "budget" or "time" in a magnet project?

Constraint. These are restrictions on resources or conditions.
What is a materials constraint in a magnetic solution design?

A limit on what materials can be used to build it. This restricts which supplies you can use.
What should you do first when defining criteria and constraints for a magnetic solution?

State the problem and what the solution must do. Understanding the problem guides all decisions.
Which option is a criterion for strength: "must lift 5 washers" or "must use tape only"?

Must lift 5 washers. Lifting ability is a performance goal to meet.
Which option is a constraint: "must attract paper" or "must be made only from cardboard and 1 magnet"?

Must be made only from cardboard and 1 magnet. Material limits are constraints, not goals.
What is the best way to check if a magnetic solution meets the criteria?

Test it and compare results to each criterion. Testing verifies if goals are met.
Choose the statement that is a criterion, not a constraint: A) "Use 2 magnets" B) "Separate nails from rice"

B) Separate nails from rice. Separating materials is a goal, not a limit.
Identify whether this statement is a criterion or constraint: "Use only $2$ magnets."

Constraint. This limits resources (number of magnets allowed).
What is one constraint related to cost in a magnetic solution?

The solution must stay within the budget limit. This constraint sets a spending limit for your project.
What is a common safety constraint for a magnetic solution?

Must be safe to use and not cause injury. Safety rules limit how solutions can be designed.
Identify the criterion in this statement: "The tool must separate iron nails from sand."

Must separate iron nails from sand. This states what the tool must accomplish.
Identify whether this statement is a criterion or constraint: "The solution must separate iron objects from nonmetal objects."

Criterion. Separating objects is a performance goal.
What is one common safety constraint for a magnetic solution used by children?

No small parts or sharp edges; use safely. Safety rules limit design to protect users.
What is a criterion when designing a magnetic solution to solve a problem?

A requirement used to judge how well the solution works. Criteria measure how well your solution meets the goal.
Which option is a criterion: "must pick up 10 paper clips" or "only 2 magnets allowed"?

Must pick up 10 paper clips. This is a goal to achieve, not a limitation.
What is one constraint related to materials in a magnetic solution?

You may use only the allowed materials provided. This constraint limits which supplies you can use.
What is one constraint related to size in a magnetic solution?

The solution must fit within a specified space. This constraint limits the physical dimensions allowed.
What is one criterion that tests accuracy for a magnetic solution?

It must attract only the intended magnetic objects. This criterion ensures the magnet selects correct materials.
Identify whether this is a criterion or constraint: "The device must be easy to carry."

Criterion. Portability is a goal the device should meet.
Which word best describes a goal like "pick up the most paper clips" in a magnet project?

Criterion. This describes a desired outcome or achievement.
Which option best matches a constraint: "must be safe" or "must lift the most clips"?

Must be safe. Safety is a rule that limits design choices.
What is one criterion that tests reliability for a magnetic solution?

It must work the same way each time it is used. This criterion ensures consistent performance over time.
What is a constraint in an engineering design problem about magnets?

A limit or rule the solution must follow. Constraints restrict what you can do or use.
Which term means "how you will measure success" in a magnetic design: criterion or constraint?

Criterion. Criteria evaluate if your solution achieves its purpose.
Which option is the best criterion for a magnetic tool to pick up screws: A) Use cardboard B) Lift $5$ screws?

B) Lift $5$ screws. Lifting screws measures success; cardboard is a material constraint.
Identify whether this statement is a criterion or constraint: "The magnet tool must be easy to use."

Criterion. Being easy to use is a goal for success.
What is a constraint in an engineering design problem about magnets?

A limit on the solution, such as materials, time, or cost. Constraints restrict how you can solve the problem.
What is a constraint when designing a magnetic solution to solve a problem?

A limit or rule the solution must follow. Constraints are boundaries that restrict your design choices.
Which option is the best constraint for a magnetic tool: A) Must lift $8$ clips B) Must use only tape and a magnet?

B) Must use only tape and a magnet. Material limits are constraints; lifting ability is a criterion.
What is a criterion in an engineering design problem about magnets?

A requirement the solution must meet to be successful. Criteria define what makes a solution successful.
What is the purpose of listing criteria and constraints before building a magnetic solution?

To define success and limits before designing and testing. Clear goals and limits guide effective design.
Identify whether this statement is a criterion or constraint: "The solution must not damage the objects being tested."

Constraint. Not damaging objects limits how it works.
What is one criterion that tests magnet strength for a magnetic solution?

It must pick up the required number of paper clips. This criterion measures if the magnet is strong enough.
What is one constraint related to time in a magnetic solution?

The solution must be built and tested within the time limit. This constraint sets deadlines for completion.
What is the first step in defining criteria and constraints for a magnetic solution?

State the problem and what the solution must do. Understanding the problem helps identify needed criteria and constraints.
Which option is a constraint: "must attract steel" or "must fit in a 10 cm box"?

Must fit in a 10 cm box. Size limits what you can build, making it a constraint.
Identify whether this statement is a criterion or constraint: "It must be finished in $15$ minutes."

Constraint. This limits time allowed, making it a constraint.

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