Biology, 19.11.2020 01:20 reaunnatowns

23. Sally and Juan’s science teacher challenged her students to build a paper airplane that would stay airborne for ninety seconds. The students have two days to design and test their planes. The assignment will end with a “fly-off.” First Sally and Juan researched plane designs. Then they built their first plane. Whenever they tested the plane, it would take a nose dive straight into the floor. They changed the design by reshaping the nose of the plane and adding some weight to the tail. The plane flew but did not get very far. Finally, they tried to change the way they threw the plane. After many tries, their plane stayed in the air for an average of ninety-two seconds. According to the Technological Design Process, what should their next step be?
A. Designing a product C. Evaluating the design
B. Identifying a problem D. Implementing (testing) the design

Answers: 1

Show answers

Another question on Biology

Biology, 21.06.2019 14:00

Which skill, if it cannot be performed by a 3-year-old child, should alert the nurse that the child may be developmentally delayed?

Answers: 1

Answer

Biology, 22.06.2019 03:00

1. watermelon, papaya, oranges, bananas, and lemons are included in this food group. vitamin c 2. you need 6 or more servings of this food group each day vitamins d and a 3. found in fruit and keeps blood vessels healthy calcium 4. vitamins found in milk bread and grain 5. a mineral that strengthens bones fruit

Answers: 3

Answer

Biology, 22.06.2019 05:40

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion

Answers: 2

Answer

Biology, 22.06.2019 11:30

Female luna moths (actias luna) attract males by emitting chemical signals that spread through the air. a male hundreds of meters away can detect these molecules and fly toward their source. the sensory organs responsible for this behavior are the comblike antennae visible in the photograph shown here. each filament of an antenna is equipped with thousands of receptor cells that detect the sex attractant. based on what you learned in this chapter, propose a hypothesis to account for the ability of the male moth to detect a specific molecule in the presence of many other molecules in the air. what predictions does your hypothesis make? design an experiment to test one of these predictions.

Answers: 1

Answer

You know the right answer?

23. Sally and Juan’s science teacher challenged her students to build a paper airplane that would st...

Questions