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Paul and Kat work together to test different kinds of popcorn salt to see which one people like the most. Which step should they take to make sure their tests are fair?
Have students practice using the locks in class.
Deck Screw - Cost: $5 a box...Description: does not rust and fastens wood together tightly
Put the same amount of salt on each test batch.
A: color; $0.12 cost per print; 8 copies per minute
protect the seeds and cost less
Which prototype gives the most accurate direction?
paint the prototype to make it look more colorful
Rent old tractors to plow fields. Invest in modern milking machines. Use computers to control farm equipment.
Jim’s friend suggests he use a piece of two-dollar plastic as part of a roof design for the bird feeder. This material would last longer because it would not rot. Which requirements would this suggestion fall under?
Have students practice using the locks in class.
Deck Screw - Cost: $5 a box...Description: does not rust and fastens wood together tightly
Put the same amount of salt on each test batch.
A: color; $0.12 cost per print; 8 copies per minute
protect the seeds and cost less
Which prototype gives the most accurate direction?
paint the prototype to make it look more colorful
Rent old tractors to plow fields. Invest in modern milking machines. Use computers to control farm equipment.
Students are finding the combination locks in school hard to use. The students are trying to find a solution that does not cost too much and that they can do right away. Which solution should they choose?
Have students practice using the locks in class.
Deck Screw - Cost: $5 a box...Description: does not rust and fastens wood together tightly
Put the same amount of salt on each test batch.
A: color; $0.12 cost per print; 8 copies per minute
protect the seeds and cost less
Which prototype gives the most accurate direction?
paint the prototype to make it look more colorful
Rent old tractors to plow fields. Invest in modern milking machines. Use computers to control farm equipment.
Larry is putting together a small, wooden flower box. He needs something to hold the wood together. It must cost less than $10 and should not rust. Which option is best for him to use?
Have students practice using the locks in class.
Deck Screw - Cost: $5 a box...Description: does not rust and fastens wood together tightly
Put the same amount of salt on each test batch.
A: color; $0.12 cost per print; 8 copies per minute
protect the seeds and cost less
Which prototype gives the most accurate direction?
paint the prototype to make it look more colorful
Rent old tractors to plow fields. Invest in modern milking machines. Use computers to control farm equipment.
Paul designed a stand for a fish tank in the classroom. His prototype may need improvements. Which action will NOT help Paul improve his design?
Have students practice using the locks in class.
Deck Screw - Cost: $5 a box...Description: does not rust and fastens wood together tightly
Put the same amount of salt on each test batch.
A: color; $0.12 cost per print; 8 copies per minute
protect the seeds and cost less
Which prototype gives the most accurate direction?
paint the prototype to make it look more colorful
Rent old tractors to plow fields. Invest in modern milking machines. Use computers to control farm equipment.
Deena compares four different printers for her computer. She wants it to print in color and print more than six pages per minute. She wants to spend less than $0.13 per copy. Her research is shown in the table. Which printer should she choose?
Have students practice using the locks in class.
Deck Screw - Cost: $5 a box...Description: does not rust and fastens wood together tightly
Put the same amount of salt on each test batch.
A: color; $0.12 cost per print; 8 copies per minute
protect the seeds and cost less
Which prototype gives the most accurate direction?
paint the prototype to make it look more colorful
Rent old tractors to plow fields. Invest in modern milking machines. Use computers to control farm equipment.
Farmers want to improve their farms with better technology. Which methods will NOT help them meet this need?
Have students practice using the locks in class.
Deck Screw - Cost: $5 a box...Description: does not rust and fastens wood together tightly
Put the same amount of salt on each test batch.
A: color; $0.12 cost per print; 8 copies per minute
protect the seeds and cost less
Which prototype gives the most accurate direction?
paint the prototype to make it look more colorful
Rent old tractors to plow fields. Invest in modern milking machines. Use computers to control farm equipment.
Jill and Jack are making a weathervane that tells the direction of wind. They tested 3 prototype designs in the same place. They recorded their data every hour for 4 hours. They compared their data to the news. Which ? were they trying to answer?
Have students practice using the locks in class.
Deck Screw - Cost: $5 a box...Description: does not rust and fastens wood together tightly
Put the same amount of salt on each test batch.
A: color; $0.12 cost per print; 8 copies per minute
protect the seeds and cost less
Which prototype gives the most accurate direction?
paint the prototype to make it look more colorful
Rent old tractors to plow fields. Invest in modern milking machines. Use computers to control farm equipment.
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