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  • Cracking Up: A Story About Erosion (Science Works)

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Buy from Amazon $7.95$2.44 $10.00 $6.67 $3.33 $0.00 Dec Mar Jun Sep Dec Mar Jun Sep Dec Mar Jun 2014 2015 2016 $7.16, Sep 10 - Jun 10$7.16, Sep 10 - Jun 10$4.30, May 3 5:59 am$4.08, May 3 - May 7$7.16, Sep 10 - Jun 10$4.27, May 4 - May 8$4.08, May 3 - May 7$7.16, Sep 10 - Jun 10$4.27, May 4 - May 8$4.07, May 7 - May 8$7.16, Sep 10 - Jun 10$3.52, May 9 - May 27$3.43, May 9 - Jun 12$7.16, Sep 10 - Jun 10$3.51, May 28 - Jun 12$3.43, May 9 - Jun 12$7.15, Jun 11 - Nov 12$3.51, May 28 - Jun 12$3.43, May 9 - Jun 12$7.15, Jun 11 - Nov 12$3.14, Jun 12 - Jun 25$3.06, Jun 12 - Jun 25$7.15, Jun 11 - Nov 12$4.27, Jun 25 - Jul 2$4.12, Jun 25 - Jul 2$7.15, Jun 11 - Nov 12$3.14, Jul 4 - Jul 5$3.06, Jul 4 - Jul 5$7.15, Jun 11 - Nov 12$3.12, Jul 6 3:00 pm$3.04, Jul 6 3:00 pm$7.15, Jun 11 - Nov 12$3.14, Jul 9 - Jul 10$3.06, Jul 9 - Jul 10$7.15, Jun 11 - Nov 12$2.98, Jul 11 4:15 pm$2.90, Jul 11 4:15 pm$7.15, Jun 11 - Nov 12$2.94, Jul 14 7:41 am$2.86, Jul 14 7:41 am$7.15, Jun 11 - Nov 12$3.04, Jul 16 10:37 pm$2.96, Jul 16 10:37 pm$7.15, Jun 11 - Nov 12$3.06, Jul 18 - Jul 19$2.98, Jul 18 - Jul 19$7.15, Jun 11 - Nov 12$3.15, Jul 21 6:02 am$3.07, Jul 21 6:02 am$7.15, Jun 11 - Nov 12$3.13, Jul 23 - Jul 29$3.05, Jul 23 - Jul 29$7.15, Jun 11 - Nov 12$3.15, Jul 30 - Aug 5$3.07, Jul 30 - Aug 5$7.15, Jun 11 - Nov 12$4.27, Aug 6 - Aug 20$4.12, Aug 6 - Aug 12$7.15, Jun 11 - Nov 12$4.27, Aug 6 - Aug 20$4.14, Aug 13 - Aug 20$7.15, Jun 11 - Nov 12$3.22, Aug 21 - Sep 14$3.14, Aug 21 - Sep 14$7.15, Jun 11 - Nov 12$3.21, Sep 15 - Sep 28$3.13, Sep 15 - Sep 28$7.15, Jun 11 - Nov 12$3.29, Sep 30 - Oct 18$3.21, Sep 30 - Oct 18$7.15, Jun 11 - Nov 12$3.55, Oct 19 - Nov 3$3.46, Oct 19 - Oct 26$7.15, Jun 11 - Nov 12$3.55, Oct 28 - Nov 3$3.55, Oct 19 - Nov 3$7.15, Jun 11 - Nov 12$3.16, Nov 7 - Nov 12$3.16, Nov 7 - Nov 12$7.07, Nov 15 - Nov 17$3.99, Nov 15 - Jan 2$3.95, Nov 15 10:54 am$7.95, Nov 19 - Apr 25$3.99, Nov 15 - Jan 2$3.99, Nov 19 - Nov 20$7.95, Nov 19 - Apr 25$3.99, Nov 15 - Jan 2$3.95, Nov 21 9:30 am$7.95, Nov 19 - Apr 25$3.99, Nov 15 - Jan 2$3.99, Nov 25 - Nov 26$7.95, Nov 19 - Apr 25$3.99, Nov 15 - Jan 2$3.98, Dec 6 3:18 pm$7.95, Nov 19 - Apr 25$3.99, Nov 15 - Jan 2$3.95, Dec 7 - Dec 8$7.95, Nov 19 - Apr 25$3.99, Nov 15 - Jan 2$3.98, Dec 10 10:09 pm$7.95, Nov 19 - Apr 25$3.99, Nov 15 - Jan 2$3.95, Dec 11 - Dec 13$7.95, Nov 19 - Apr 25$3.99, Nov 15 - Jan 2$3.98, Dec 15 10:55 pm$7.95, Nov 19 - Apr 25$3.99, Nov 15 - Jan 2$3.95, Dec 17 9:26 pm$7.95, Nov 19 - Apr 25$3.99, Nov 15 - Jan 2$3.98, Dec 20 - Dec 25$7.95, Nov 19 - Apr 25$3.99, Nov 15 - Jan 2$3.95, Dec 26 - Dec 28$7.95, Nov 19 - Apr 25$3.99, Nov 15 - Jan 2$3.98, Dec 30 11:20 am$7.95, Nov 19 - Apr 25$3.99, Nov 15 - Jan 2$3.95, Jan 1 - Jan 2$7.95, Nov 19 - Apr 25$3.93, Jan 4 - Jan 5$3.92, Jan 4 - Jan 5$7.95, Nov 19 - Apr 25$3.88, Jan 6 11:59 pm$3.87, Jan 6 11:59 pm$7.95, Nov 19 - Apr 25$3.87, Jan 8 - Feb 16$3.86, Jan 9 - Jan 29$7.95, Nov 19 - Apr 25$3.87, Jan 8 - Feb 16$3.84, Jan 30 - Feb 3$7.95, Nov 19 - Apr 25$3.87, Jan 8 - Feb 16$3.82, Feb 5 - Feb 10$7.95, Nov 19 - Apr 25$3.87, Jan 8 - Feb 16$3.80, Feb 12 12:56 am$7.95, Nov 19 - Apr 25$3.87, Jan 8 - Feb 16$3.78, Feb 13 - Feb 16$7.95, Nov 19 - Apr 25$3.27, Feb 18 - Feb 24$3.27, Feb 18 - Feb 24$7.95, Nov 19 - Apr 25$3.74, Feb 28 8:21 am$3.74, Feb 28 8:21 am$7.95, Nov 19 - Apr 25$3.76, Mar 2 6:19 pm$3.76, Mar 2 6:19 pm$7.95, Nov 19 - Apr 25$3.89, Mar 4 9:26 pm$3.86, Mar 4 9:26 pm$7.95, Nov 19 - Apr 25$3.89, Mar 7 12:40 am$3.84, Mar 7 12:40 am$7.95, Nov 19 - Apr 25$3.78, Mar 10 5:29 am$3.77, Mar 10 5:29 am$7.95, Nov 19 - Apr 25$3.89, Mar 12 1:29 pm$3.66, Mar 12 1:29 pm$7.95, Nov 19 - Apr 25$3.61, Mar 14 10:33 pm$3.61, Mar 14 10:33 pm$7.95, Nov 19 - Apr 25$3.59, Mar 17 7:34 pm$3.59, Mar 17 7:34 pm$7.95, Nov 19 - Apr 25$3.68, Mar 20 4:02 am$3.67, Mar 20 4:02 am$7.95, Nov 19 - Apr 25$3.49, Mar 22 1:50 pm$3.48, Mar 22 1:50 pm$7.95, Nov 19 - Apr 25$3.60, Mar 24 9:25 pm$3.60, Mar 24 - Mar 27$7.95, Nov 19 - Apr 25$3.61, Mar 27 6:22 am$3.60, Mar 24 - Mar 27$7.95, Nov 19 - Apr 25$3.57, Mar 28 - Mar 30$3.57, Mar 28 - Apr 1$7.95, Nov 19 - Apr 25$3.60, Apr 1 3:39 am$3.57, Mar 28 - Apr 1$7.95, Nov 19 - Apr 25$3.56, Apr 2 - Apr 24$3.56, Apr 2 - Apr 24$7.95, Nov 19 - Apr 25$3.89, Apr 25 5:40 pm$3.59, Apr 25 5:40 pm$7.95, Apr 27 - Jun 7$3.55, Apr 27 7:53 am$3.55, Apr 27 7:53 am$7.95, Apr 27 - Jun 7$3.89, Apr 28 8:56 pm$3.59, Apr 28 - May 3$7.95, Apr 27 - Jun 7$3.81, May 1 - May 12$3.59, Apr 28 - May 3$7.95, Apr 27 - Jun 7$3.81, May 1 - May 12$3.70, May 4 9:40 am$7.95, Apr 27 - Jun 7$3.81, May 1 - May 12$3.69, May 7 11:30 am$7.95, Apr 27 - Jun 7$3.81, May 1 - May 12$3.70, May 11 - May 12$7.95, Apr 27 - Jun 7$3.71, May 16 - May 18$3.69, May 16 - May 20$7.95, Apr 27 - Jun 7$3.88, May 20 4:17 pm$3.69, May 16 - May 20$7.95, Apr 27 - Jun 7$3.65, May 24 6:20 pm$3.65, May 24 6:20 pm$7.95, Apr 27 - Jun 7$3.60, May 29 4:44 am$3.60, May 29 4:44 am$7.95, Apr 27 - Jun 7$3.88, Jun 2 7:47 pm$3.64, Jun 2 7:47 pm$7.95, Apr 27 - Jun 7$3.58, Jun 7 10:28 am$3.58, Jun 7 10:28 amOOS $7.95, Jun 11 10:30 am$3.62, Jun 11 10:30 am$3.62, Jun 11 10:30 am$7.95, Jun 15 - Jul 23$3.55, Jun 15 5:20 am$3.55, Jun 15 5:20 am$7.95, Jun 15 - Jul 23$3.59, Jun 17 2:39 am$3.59, Jun 17 2:39 am$7.95, Jun 15 - Jul 23$4.06, Jun 20 - Jun 24$3.95, Jun 20 - Jun 24$7.95, Jun 15 - Jul 23$4.20, Jun 28 6:49 pm$3.94, Jun 28 6:49 pm$7.95, Jun 15 - Jul 23$4.03, Jul 2 - Jul 5$3.86, Jul 2 - Aug 18$7.95, Jun 15 - Jul 23$3.94, Jul 7 - Jul 14$3.86, Jul 2 - Aug 18$7.95, Jun 15 - Jul 23$3.95, Jul 16 - Aug 11$3.86, Jul 2 - Aug 18$6.56, Jul 27 - Jul 31$3.95, Jul 16 - Aug 11$3.86, Jul 2 - Aug 18$6.42, Aug 1 - Aug 5$3.95, Jul 16 - Aug 11$3.86, Jul 2 - Aug 18$6.29, Aug 9 - Aug 11$3.95, Jul 16 - Aug 11$3.86, Jul 2 - Aug 18$6.46, Aug 15 2:15 am$4.03, Aug 15 - Aug 18$3.86, Jul 2 - Aug 18$6.43, Aug 17 - Aug 18$4.03, Aug 15 - Aug 18$3.86, Jul 2 - Aug 18OOS $6.43, Aug 20 - Aug 26$6.27, Aug 20 7:22 pm$3.99, Aug 20 7:22 pmOOS $6.43, Aug 20 - Aug 26$3.98, Aug 24 12:29 pm$3.79, Aug 24 12:29 pmOOS $6.43, Aug 20 - Aug 26$3.99, Aug 26 - Sep 6$3.73, Aug 26 10:27 amOOS $6.44, Aug 30 - Sep 14$6.29, Aug 30 4:22 am$3.99, Aug 26 - Sep 6OOS $6.44, Aug 30 - Sep 14$4.38, Sep 2 11:26 pm$3.99, Aug 26 - Sep 6OOS $6.44, Aug 30 - Sep 14$3.99, Aug 26 - Sep 6$3.98, Sep 4 - Sep 6OOS $6.44, Aug 30 - Sep 14$4.16, Sep 10 - Sep 14$4.11, Sep 10 7:41 pmOOS $6.44, Aug 30 - Sep 14$4.16, Sep 10 - Sep 14$4.03, Sep 14 - Sep 16OOS $6.45, Sep 16 - Sep 24$5.46, Sep 16 3:08 pm$4.03, Sep 14 - Sep 16OOS $6.45, Sep 16 - Sep 24$4.38, Sep 20 - Sep 26$4.16, Sep 20 - Sep 24OOS $6.46, Sep 26 - Oct 2$4.38, Sep 20 - Sep 26$4.07, Sep 26 9:54 amOOS $6.46, Sep 26 - Oct 2$4.29, Sep 30 8:41 am$4.01, Sep 30 8:41 amOOS $6.46, Sep 26 - Oct 2$4.27, Oct 2 10:06 am$4.00, Oct 2 10:06 amOOS $6.47, Oct 4 - Oct 8$4.38, Oct 4 - Oct 8$3.99, Oct 4 - Oct 8OOS $6.48, Oct 12 4:03 pm$4.28, Oct 12 - Oct 14$4.03, Oct 12 4:03 pmOOS $6.41, Oct 14 4:24 pm$4.28, Oct 12 - Oct 14$4.06, Oct 14 4:24 pm$6.41, Oct 18 - Oct 20$4.03, Oct 20 - Nov 1$3.86, Oct 20 11:43 amOOS $6.41, Oct 22 11:18 am$4.03, Oct 20 - Nov 1$3.84, Oct 22 11:18 amOOS $6.34, Oct 24 - Oct 26$4.03, Oct 20 - Nov 1$4.01, Oct 24 - Oct 26$6.27, Oct 30 - Nov 5$4.03, Oct 20 - Nov 1$3.88, Oct 30 - Nov 1$6.27, Oct 30 - Nov 5$4.04, Nov 5 - Nov 11$3.81, Nov 5 - Nov 9$6.13, Nov 11 - Nov 13$4.04, Nov 5 - Nov 11$3.80, Nov 11 2:58 pm$6.13, Nov 11 - Nov 13$3.79, Nov 13 - Nov 15$3.78, Nov 13 5:20 pm$6.21, Nov 15 - Nov 18$3.79, Nov 13 - Nov 15$3.76, Nov 15 8:33 pm$6.21, Nov 15 - Nov 18$3.75, Nov 18 - Nov 29$3.75, Nov 18 - Nov 29$6.14, Nov 20 - Nov 27$3.75, Nov 18 - Nov 29$3.75, Nov 18 - Nov 29$6.15, Nov 29 - Dec 6$3.75, Nov 18 - Nov 29$3.75, Nov 18 - Nov 29$6.15, Nov 29 - Dec 6$3.81, Dec 4 - Dec 14$3.80, Dec 4 - Dec 14$6.08, Dec 11 - Dec 14$3.81, Dec 4 - Dec 14$3.80, Dec 4 - Dec 14$6.09, Dec 19 - Dec 24$3.79, Dec 19 - Dec 21$3.79, Dec 19 10:48 am$6.09, Dec 19 - Dec 24$3.79, Dec 19 - Dec 21$3.78, Dec 21 10:46 pm$6.09, Dec 19 - Dec 24$3.78, Dec 24 9:27 am$3.77, Dec 24 - Jan 10$6.10, Dec 29 - Jan 5$3.77, Dec 29 - Jan 13$3.77, Dec 24 - Jan 10$6.11, Jan 10 - Jan 13$3.77, Dec 29 - Jan 13$3.77, Dec 24 - Jan 10$6.11, Jan 10 - Jan 13$3.77, Dec 29 - Jan 13$3.76, Jan 13 1:06 amOOS $6.11, Jan 15 1:47 pm$3.75, Jan 15 1:47 pm$3.74, Jan 15 1:47 pmOOS $6.12, Jan 18 - Jan 25$4.19, Jan 18 2:44 am$4.17, Jan 18 2:44 amOOS $6.12, Jan 18 - Jan 25$4.36, Jan 20 3:39 pm$4.14, Jan 20 3:39 pmOOS $6.12, Jan 18 - Jan 25$4.04, Jan 23 4:55 am$4.02, Jan 23 - Jan 28OOS $6.12, Jan 18 - Jan 25$4.02, Jan 23 - Jan 28$4.01, Jan 25 - Jan 28OOS $6.13, Jan 28 - Jan 30$4.02, Jan 23 - Jan 28$4.01, Jan 25 - Jan 28OOS $6.13, Jan 28 - Jan 30$4.00, Jan 30 8:37 pm$3.98, Jan 30 8:37 pm$6.13, Feb 2 - Feb 4$3.88, Feb 2 9:06 am$3.84, Feb 2 9:06 am$6.13, Feb 2 - Feb 4$3.83, Feb 4 - Feb 7$3.83, Feb 4 - Feb 15$6.14, Feb 7 - Feb 15$3.83, Feb 4 - Feb 7$3.83, Feb 4 - Feb 15$6.14, Feb 7 - Feb 15$3.83, Feb 4 - Feb 15$2.44, Feb 12 - Feb 15$6.15, Feb 18 - Feb 26$3.82, Feb 18 5:16 am$2.45, Feb 18 5:16 am$6.15, Feb 18 - Feb 26$3.81, Feb 20 - Feb 26$3.81, Feb 20 - Feb 23$6.15, Feb 18 - Feb 26$3.81, Feb 20 - Feb 26$3.79, Feb 26 - Feb 29$6.16, Feb 29 9:01 am$3.79, Feb 29 9:01 am$3.79, Feb 26 - Feb 29$6.17, Mar 5 - Mar 11$3.77, Mar 5 - Mar 17$3.77, Mar 5 - Mar 17$6.18, Mar 17 10:04 am$3.77, Mar 5 - Mar 17$3.77, Mar 5 - Mar 17$6.19, Mar 23 - Mar 29$3.75, Mar 23 9:33 am$3.74, Mar 23 9:33 am$6.19, Mar 23 - Mar 29$3.73, Mar 29 - Apr 4$3.73, Mar 29 - Apr 4$6.20, Apr 4 2:54 am$3.73, Mar 29 - Apr 4$3.73, Mar 29 - Apr 4 17,517679,065 562,500 421,875 281,250 140,625 Oct Dec Feb Apr Jun Aug Oct Dec Feb Apr Jun 2015 2016

Price Details

New

Latest $6.20 Apr 4, '16
Highest $7.95 Jun 15, '15
Lowest $6.08 Dec 11, '15
Average $6.18 (30d avg)
$6.15 (90d avg)
$6.18 (180d avg)
$6.78 (365d avg)
$7.13 (Lifetime average)
Added Sep 10, 2013

3rd Party New

Latest $3.73 Apr 4, '16
Highest $5.46 Sep 16, '15
Lowest $2.94 Jul 14, '14
Average $3.76 (30d avg)
$3.83 (90d avg)
$3.83 (180d avg)
$3.84 (365d avg)
$3.71 (Lifetime average)
Added Sep 10, 2013

3rd Party Used

Latest $3.73 Apr 4, '16
Highest $6.29 Aug 30, '15
Lowest $2.44 Feb 12, '16
Average $3.76 (30d avg)
$3.71 (90d avg)
$3.82 (180d avg)
$3.90 (365d avg)
$3.74 (Lifetime average)
Added Sep 10, 2013

Sales Rank

30 day average: 112,790
90 day average: 145,252

Product Description

Describes the process of erosion and how water, ice, wind, and sun wear away at Earth's surface.

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