7th grade lower science workbook A The birth of a new life 2 answers

You better don't copy it, it's useless to copy it, it's better not to do it!!

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Who is kinder?

If you put a wooden block into 50 ml of water in a graduated cylinder, and exactly half of it is immersed in water, and the reading of the graduated cylinder becomes 56 milliliters, then the volume of each wooden block is.

Section 1 – Water on Earth (1) Du

1. Oceans and atmosphere.

2. Salt zhi gram can not can't.

3、c4、d

5、c6、d

7. (dao1) (2) slightly, yourself.

You can draw a fan-shaped statistical chart inside.

Among them: saltwater freshwater.

B: Glacier water, groundwater, and other freshwater.

3) There are very few freshwater resources on the planet.

Among freshwater resources, glacier water accounts for the largest proportion.

8. Wash your face and bath water to flush the toilet.

Rice washing water is used to water the flowers.

Try not to use the bath method, but to use the shower method.

9、（1）b

2) Because the gill tissue of freshwater fish does not have "chlorine secreting cells".

.What does the sail seek in the distance, and what does it abandon in the homeland?

2."The waves are raging—the cold wind is howling, the mast is arching and the waist is rolling. What kind of picture does it look like?

3."Hometown" in the poemWhat is omitted after "rattling"? What is the effect of expression?

4. Talk about the symbolic meaning of "sail" in relation to the whole poem and related context.

1.Seek freedom and pursue ideals; Abandon cowardice and mediocrity in their homeland.

2.It shows that in the pale blue sea, there is a lone sail cruising. It shone with a white light, a blinding white light.

The white sail seemed to be suffering greatly. It wandered in a distant land, with rough waves mixed with howling sea breezes. They were going to overturn the spirit, to bury the lone rebel in their own mighty blows.

And the sail, tenaciously moving forward in the storm, fighting against the ideal and the light.

3."Hometown"The scene when anchored in his hometown is omitted; "Rattle"The specific picture of the fight against the storm is omitted.

4.The sail is the embodiment of the poet, the symbol of the poet's lonely and rebellious soul, the yearning for freedom also symbolizes the poet's yearning for freedom, and also symbolizes the poet's generation of aristocratic revolutionaries yearning for freedom. Poetry is also of a high level in terms of depicting landscapes and, in turn, in illustrating thought-provoking philosophies.

The harsh social environment is aptly expressed in the poem's description of the terrible scene of the sea; The enterprising spirit and tenacious vitality are also well reflected in the narrative process of the poem.

We teachers don't accept answers, and the answers are flying all over the classroom.

Just go to Sogou and ask, or go to the library.

Section 3 The Existence of Force.

a) 1Object Motion State Motion Shape 2Mutual Ball Players 3Deformation Kinematic state 4The forces are mutual.

5.Movement speed Direction of motion Deformation Deformation Motion state.

12.Kinematic state deformation 13When the hand pushes the wall, the hand has a force on the wall, and since the force is reciprocal, the wall also has a force on the opponent, thus making the person retreat.

14.(1) The action of force between objects is mutual, and (2) The action of force can be generated when there is no contact between objects.

b) 4The dynamometer Newton N 5Shorten outward 6

1)5 5 (2)1 1 Opposite (3) 7(1) a, d, e (2) (3) b, f, h (4) The amount of tensile force required when the wire is pulled off is related to the material and cross-sectional area of the wire, and has nothing to do with the length of the wire. When a wire of the same material is broken, the larger the cross-sectional area, the greater the tensile force required 8

1) Material, length, shape, diameter, etc. (2) Take two springs with different materials and the same other conditions, pull the springs with the same size, and measure the elongation of the springs with a scale, and compare them.

100% standard answer!! But if you don't want to be discovered by the teacher, then some sentences can be modified to mean the same!!

I've typed so much, so I've worked so hard to reward more rewards!!

Is it "The Existence of Force (2)"? If so, please refer to it!

BAC dynamometer Newtonian cattle.

n shrinks outward 5,5,1,1 and vice versa.

abcbfh

When the wire is pulled off, it is related to the tensile force, the material, and the length and thickness are not related to the length.

Find 2 springs of the same length and different materials, stretch them of the same length, and measure the size of the force (this is not my answer!). It's a reference to someone else, but I looked at it and it should be right! Hope to give me the points.

A Ben 35 Lesson 5 The Life of a Plant (1) adbbcd embryo seed coat endosperm cotyledon number of cotyledons Phaseolus vulgaris dicot plant There are two ** leaves in the seed starch water starch a Lesson 37 Section 5 The life of a plant (3) aabcdb bud apical bud lateral bud growth part 2 flower column 3 stigma 9 ovary ovary ovule ovule anther 7 filament anther pollen amphoteroditic c a c a, b a seed germination seedling growth and development plant flowering plant fruit b 36 lesson 5 the life of a plant (2) bbcacab seeds Suitable temperature and sufficient air A Seeds lack sufficient moisture Sufficient water and suitable temperature c Seeds lack air Seeds germinate need sufficient water, air and suitable temperature to place seeds in a low-temperature, dry and ventilated environment A 4 Moisture and temperature Seed germination requires sufficient water, air and suitable temperature and light Take twenty seeds of the same fullness and divide them into two groups, A and B, and plant them in two same pots with the same soil. Both pots were poured with the same amount of water, pots A and B were at the same room temperature, pots A were placed in a shady place, pots B were placed in the sun, and the germination of the two pots was observed after a few days.